Home / 645,314.36-890,497.23-358,828.30

Finding the Fourth Proportional to 645,314.36, 890,497.23 and 358,828.30

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Solution

The fourth proportional to 645,314.36, 890,497.23 and 358,828.30 is: 495,162.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,314.36 : 890,497.23 = 358,828.30 : x
  2. Step 2: Convert to fraction form
    645,314.36/890,497.23 = 358,828.30/x
  3. Step 3: Cross multiply
    645,314.36x = 890,497.23 × 358,828.30
  4. Step 4: Simplify right side
    645,314.36x = 319,535,607,195.61
  5. Step 5: Solve for x
    x = 319,535,607,195.61/645,314.36
  6. Step 6: Final answer
    x = 495,162.71

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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.