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Finding the Fourth Proportional to 521,645.40, 731,878.20 and 521,645.40

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Solution

The fourth proportional to 521,645.40, 731,878.20 and 521,645.40 is: 731,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,645.40 : 731,878.20 = 521,645.40 : x
  2. Step 2: Convert to fraction form
    521,645.40/731,878.20 = 521,645.40/x
  3. Step 3: Cross multiply
    521,645.40x = 731,878.20 × 521,645.40
  4. Step 4: Simplify right side
    521,645.40x = 381,780,896,390.28
  5. Step 5: Solve for x
    x = 381,780,896,390.28/521,645.40
  6. Step 6: Final answer
    x = 731,878.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.