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Finding the Fourth Proportional to 660,063.20, 988,345.20 and 520,095.20

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Solution

The fourth proportional to 660,063.20, 988,345.20 and 520,095.20 is: 778,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,063.20 : 988,345.20 = 520,095.20 : x
  2. Step 2: Convert to fraction form
    660,063.20/988,345.20 = 520,095.20/x
  3. Step 3: Cross multiply
    660,063.20x = 988,345.20 × 520,095.20
  4. Step 4: Simplify right side
    660,063.20x = 514,033,594,463.04
  5. Step 5: Solve for x
    x = 514,033,594,463.04/660,063.20
  6. Step 6: Final answer
    x = 778,764.21

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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.