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Finding the Fourth Proportional to 660,061.70, 988,342.95 and 520,093.70

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Solution

The fourth proportional to 660,061.70, 988,342.95 and 520,093.70 is: 778,761.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,061.70 : 988,342.95 = 520,093.70 : x
  2. Step 2: Convert to fraction form
    660,061.70/988,342.95 = 520,093.70/x
  3. Step 3: Cross multiply
    660,061.70x = 988,342.95 × 520,093.70
  4. Step 4: Simplify right side
    660,061.70x = 514,030,941,734.42
  5. Step 5: Solve for x
    x = 514,030,941,734.42/660,061.70
  6. Step 6: Final answer
    x = 778,761.96

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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.