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Finding the Fourth Proportional to 710,451.89, 980,437.72 and 388,181.95

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Solution

The fourth proportional to 710,451.89, 980,437.72 and 388,181.95 is: 535,698.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,451.89 : 980,437.72 = 388,181.95 : x
  2. Step 2: Convert to fraction form
    710,451.89/980,437.72 = 388,181.95/x
  3. Step 3: Cross multiply
    710,451.89x = 980,437.72 × 388,181.95
  4. Step 4: Simplify right side
    710,451.89x = 380,588,222,581.61
  5. Step 5: Solve for x
    x = 380,588,222,581.61/710,451.89
  6. Step 6: Final answer
    x = 535,698.80

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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.