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Finding the Fourth Proportional to 663,419.71, 915,298.95 and 540,701.06

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Solution

The fourth proportional to 663,419.71, 915,298.95 and 540,701.06 is: 745,987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,419.71 : 915,298.95 = 540,701.06 : x
  2. Step 2: Convert to fraction form
    663,419.71/915,298.95 = 540,701.06/x
  3. Step 3: Cross multiply
    663,419.71x = 915,298.95 × 540,701.06
  4. Step 4: Simplify right side
    663,419.71x = 494,903,109,778.38
  5. Step 5: Solve for x
    x = 494,903,109,778.38/663,419.71
  6. Step 6: Final answer
    x = 745,987.96

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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.