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Finding the Fourth Proportional to 878,948.02, 1,317,985.80 and 279,831.16

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Solution

The fourth proportional to 878,948.02, 1,317,985.80 and 279,831.16 is: 419,607.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,948.02 : 1,317,985.80 = 279,831.16 : x
  2. Step 2: Convert to fraction form
    878,948.02/1,317,985.80 = 279,831.16/x
  3. Step 3: Cross multiply
    878,948.02x = 1,317,985.80 × 279,831.16
  4. Step 4: Simplify right side
    878,948.02x = 368,813,495,277.53
  5. Step 5: Solve for x
    x = 368,813,495,277.53/878,948.02
  6. Step 6: Final answer
    x = 419,607.86

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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.