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Finding the Fourth Proportional to 710,498.66, 980,486.63 and 388,211.06

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Solution

The fourth proportional to 710,498.66, 980,486.63 and 388,211.06 is: 535,730.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,498.66 : 980,486.63 = 388,211.06 : x
  2. Step 2: Convert to fraction form
    710,498.66/980,486.63 = 388,211.06/x
  3. Step 3: Cross multiply
    710,498.66x = 980,486.63 × 388,211.06
  4. Step 4: Simplify right side
    710,498.66x = 380,635,753,948.13
  5. Step 5: Solve for x
    x = 380,635,753,948.13/710,498.66
  6. Step 6: Final answer
    x = 535,730.44

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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.