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Finding the Fourth Proportional to 710,854.16, 980,992.68 and 388,555.28

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Solution

The fourth proportional to 710,854.16, 980,992.68 and 388,555.28 is: 536,213.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,854.16 : 980,992.68 = 388,555.28 : x
  2. Step 2: Convert to fraction form
    710,854.16/980,992.68 = 388,555.28/x
  3. Step 3: Cross multiply
    710,854.16x = 980,992.68 × 388,555.28
  4. Step 4: Simplify right side
    710,854.16x = 381,169,885,455.35
  5. Step 5: Solve for x
    x = 381,169,885,455.35/710,854.16
  6. Step 6: Final answer
    x = 536,213.91

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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.