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Finding the Fourth Proportional to 692,989.74, 956,315.76 and 387,070.47

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Solution

The fourth proportional to 692,989.74, 956,315.76 and 387,070.47 is: 534,151.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,989.74 : 956,315.76 = 387,070.47 : x
  2. Step 2: Convert to fraction form
    692,989.74/956,315.76 = 387,070.47/x
  3. Step 3: Cross multiply
    692,989.74x = 956,315.76 × 387,070.47
  4. Step 4: Simplify right side
    692,989.74x = 370,161,590,691.61
  5. Step 5: Solve for x
    x = 370,161,590,691.61/692,989.74
  6. Step 6: Final answer
    x = 534,151.62

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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.