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Finding the Fourth Proportional to 678,510.68, 936,308.20 and 376,685.24

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Solution

The fourth proportional to 678,510.68, 936,308.20 and 376,685.24 is: 519,805.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,510.68 : 936,308.20 = 376,685.24 : x
  2. Step 2: Convert to fraction form
    678,510.68/936,308.20 = 376,685.24/x
  3. Step 3: Cross multiply
    678,510.68x = 936,308.20 × 376,685.24
  4. Step 4: Simplify right side
    678,510.68x = 352,693,479,030.97
  5. Step 5: Solve for x
    x = 352,693,479,030.97/678,510.68
  6. Step 6: Final answer
    x = 519,805.35

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Double scale
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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.