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Finding the Fourth Proportional to 287,737.40, 397,068.48 and 158,681.31

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Solution

The fourth proportional to 287,737.40, 397,068.48 and 158,681.31 is: 218,975.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,737.40 : 397,068.48 = 158,681.31 : x
  2. Step 2: Convert to fraction form
    287,737.40/397,068.48 = 158,681.31/x
  3. Step 3: Cross multiply
    287,737.40x = 397,068.48 × 158,681.31
  4. Step 4: Simplify right side
    287,737.40x = 63,007,346,566.11
  5. Step 5: Solve for x
    x = 63,007,346,566.11/287,737.40
  6. Step 6: Final answer
    x = 218,975.18

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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.