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Finding the Fourth Proportional to 687,505.95, 948,932.61 and 469,802.76

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Solution

The fourth proportional to 687,505.95, 948,932.61 and 469,802.76 is: 648,446.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,505.95 : 948,932.61 = 469,802.76 : x
  2. Step 2: Convert to fraction form
    687,505.95/948,932.61 = 469,802.76/x
  3. Step 3: Cross multiply
    687,505.95x = 948,932.61 × 469,802.76
  4. Step 4: Simplify right side
    687,505.95x = 445,811,159,232.00
  5. Step 5: Solve for x
    x = 445,811,159,232.00/687,505.95
  6. Step 6: Final answer
    x = 648,446.98

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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.