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Finding the Fourth Proportional to 891,646.32, 1,230,472 and 509,681.44

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Solution

The fourth proportional to 891,646.32, 1,230,472 and 509,681.44 is: 703,360.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,646.32 : 1,230,472 = 509,681.44 : x
  2. Step 2: Convert to fraction form
    891,646.32/1,230,472 = 509,681.44/x
  3. Step 3: Cross multiply
    891,646.32x = 1,230,472 × 509,681.44
  4. Step 4: Simplify right side
    891,646.32x = 627,148,740,839.68
  5. Step 5: Solve for x
    x = 627,148,740,839.68/891,646.32
  6. Step 6: Final answer
    x = 703,360.43

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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.