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Finding the Fourth Proportional to 282,880.52, 390,385.14 and 155,565.80

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Solution

The fourth proportional to 282,880.52, 390,385.14 and 155,565.80 is: 214,686.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,880.52 : 390,385.14 = 155,565.80 : x
  2. Step 2: Convert to fraction form
    282,880.52/390,385.14 = 155,565.80/x
  3. Step 3: Cross multiply
    282,880.52x = 390,385.14 × 155,565.80
  4. Step 4: Simplify right side
    282,880.52x = 60,730,576,612.21
  5. Step 5: Solve for x
    x = 60,730,576,612.21/282,880.52
  6. Step 6: Final answer
    x = 214,686.32

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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.