Home / 645,313.80-890,496.46-358,827.74

Finding the Fourth Proportional to 645,313.80, 890,496.46 and 358,827.74

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Solution

The fourth proportional to 645,313.80, 890,496.46 and 358,827.74 is: 495,161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,313.80 : 890,496.46 = 358,827.74 : x
  2. Step 2: Convert to fraction form
    645,313.80/890,496.46 = 358,827.74/x
  3. Step 3: Cross multiply
    645,313.80x = 890,496.46 × 358,827.74
  4. Step 4: Simplify right side
    645,313.80x = 319,534,826,870.25
  5. Step 5: Solve for x
    x = 319,534,826,870.25/645,313.80
  6. Step 6: Final answer
    x = 495,161.93

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Double scale
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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.