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Finding the Fourth Proportional to 287,646.04, 431,468.72 and 77,283.98

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Solution

The fourth proportional to 287,646.04, 431,468.72 and 77,283.98 is: 115,925.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,646.04 : 431,468.72 = 77,283.98 : x
  2. Step 2: Convert to fraction form
    287,646.04/431,468.72 = 77,283.98/x
  3. Step 3: Cross multiply
    287,646.04x = 431,468.72 × 77,283.98
  4. Step 4: Simplify right side
    287,646.04x = 33,345,619,927.11
  5. Step 5: Solve for x
    x = 33,345,619,927.11/287,646.04
  6. Step 6: Final answer
    x = 115,925.88

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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.