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Finding the Fourth Proportional to 608,123.68, 912,333.94 and 428,559.24

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Solution

The fourth proportional to 608,123.68, 912,333.94 and 428,559.24 is: 642,943.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,123.68 : 912,333.94 = 428,559.24 : x
  2. Step 2: Convert to fraction form
    608,123.68/912,333.94 = 428,559.24/x
  3. Step 3: Cross multiply
    608,123.68x = 912,333.94 × 428,559.24
  4. Step 4: Simplify right side
    608,123.68x = 390,989,139,952.61
  5. Step 5: Solve for x
    x = 390,989,139,952.61/608,123.68
  6. Step 6: Final answer
    x = 642,943.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.