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Finding the Fourth Proportional to 715,957.04, 988,036.68 and 393,646.64

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Solution

The fourth proportional to 715,957.04, 988,036.68 and 393,646.64 is: 543,241.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,957.04 : 988,036.68 = 393,646.64 : x
  2. Step 2: Convert to fraction form
    715,957.04/988,036.68 = 393,646.64/x
  3. Step 3: Cross multiply
    715,957.04x = 988,036.68 × 393,646.64
  4. Step 4: Simplify right side
    715,957.04x = 388,937,319,278.76
  5. Step 5: Solve for x
    x = 388,937,319,278.76/715,957.04
  6. Step 6: Final answer
    x = 543,241.14

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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.