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Finding the Fourth Proportional to 521,943.10, 729,145.70 and 521,943.10

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Solution

The fourth proportional to 521,943.10, 729,145.70 and 521,943.10 is: 729,145.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,943.10 : 729,145.70 = 521,943.10 : x
  2. Step 2: Convert to fraction form
    521,943.10/729,145.70 = 521,943.10/x
  3. Step 3: Cross multiply
    521,943.10x = 729,145.70 × 521,943.10
  4. Step 4: Simplify right side
    521,943.10x = 380,572,567,009.67
  5. Step 5: Solve for x
    x = 380,572,567,009.67/521,943.10
  6. Step 6: Final answer
    x = 729,145.70

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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.