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Finding the Fourth Proportional to 710,643.98, 980,691.24 and 388,354.12

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Solution

The fourth proportional to 710,643.98, 980,691.24 and 388,354.12 is: 535,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,643.98 : 980,691.24 = 388,354.12 : x
  2. Step 2: Convert to fraction form
    710,643.98/980,691.24 = 388,354.12/x
  3. Step 3: Cross multiply
    710,643.98x = 980,691.24 × 388,354.12
  4. Step 4: Simplify right side
    710,643.98x = 380,855,483,501.91
  5. Step 5: Solve for x
    x = 380,855,483,501.91/710,643.98
  6. Step 6: Final answer
    x = 535,930.08

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1.5x scale

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.