Home / 645,321.14-890,543.92-358,835.08

Finding the Fourth Proportional to 645,321.14, 890,543.92 and 358,835.08

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Solution

The fourth proportional to 645,321.14, 890,543.92 and 358,835.08 is: 495,192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,321.14 : 890,543.92 = 358,835.08 : x
  2. Step 2: Convert to fraction form
    645,321.14/890,543.92 = 358,835.08/x
  3. Step 3: Cross multiply
    645,321.14x = 890,543.92 × 358,835.08
  4. Step 4: Simplify right side
    645,321.14x = 319,558,395,653.27
  5. Step 5: Solve for x
    x = 319,558,395,653.27/645,321.14
  6. Step 6: Final answer
    x = 495,192.82

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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.