Home / 645,461.38-890,724.04-358,975.32

Finding the Fourth Proportional to 645,461.38, 890,724.04 and 358,975.32

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Solution

The fourth proportional to 645,461.38, 890,724.04 and 358,975.32 is: 495,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,461.38 : 890,724.04 = 358,975.32 : x
  2. Step 2: Convert to fraction form
    645,461.38/890,724.04 = 358,975.32/x
  3. Step 3: Cross multiply
    645,461.38x = 890,724.04 × 358,975.32
  4. Step 4: Simplify right side
    645,461.38x = 319,747,947,290.69
  5. Step 5: Solve for x
    x = 319,747,947,290.69/645,461.38
  6. Step 6: Final answer
    x = 495,378.90

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Half scale
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Double scale
Find fourth proportional to 645,462.38, 890,725.42 and 358,976.32
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.