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Finding the Fourth Proportional to 570,989.25, 787,990.98 and 316,340.44

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Solution

The fourth proportional to 570,989.25, 787,990.98 and 316,340.44 is: 436,564.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,989.25 : 787,990.98 = 316,340.44 : x
  2. Step 2: Convert to fraction form
    570,989.25/787,990.98 = 316,340.44/x
  3. Step 3: Cross multiply
    570,989.25x = 787,990.98 × 316,340.44
  4. Step 4: Simplify right side
    570,989.25x = 249,273,412,545.53
  5. Step 5: Solve for x
    x = 249,273,412,545.53/570,989.25
  6. Step 6: Final answer
    x = 436,564.11

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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.