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Finding the Fourth Proportional to 610,689.16, 916,560.78 and 423,831.88

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Solution

The fourth proportional to 610,689.16, 916,560.78 and 423,831.88 is: 636,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,689.16 : 916,560.78 = 423,831.88 : x
  2. Step 2: Convert to fraction form
    610,689.16/916,560.78 = 423,831.88/x
  3. Step 3: Cross multiply
    610,689.16x = 916,560.78 × 423,831.88
  4. Step 4: Simplify right side
    610,689.16x = 388,467,678,521.67
  5. Step 5: Solve for x
    x = 388,467,678,521.67/610,689.16
  6. Step 6: Final answer
    x = 636,113.60

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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.