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Finding the Fourth Proportional to 710,071.56, 979,893.57 and 387,781.56

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Solution

The fourth proportional to 710,071.56, 979,893.57 and 387,781.56 is: 535,135.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,071.56 : 979,893.57 = 387,781.56 : x
  2. Step 2: Convert to fraction form
    710,071.56/979,893.57 = 387,781.56/x
  3. Step 3: Cross multiply
    710,071.56x = 979,893.57 × 387,781.56
  4. Step 4: Simplify right side
    710,071.56x = 379,984,657,208.57
  5. Step 5: Solve for x
    x = 379,984,657,208.57/710,071.56
  6. Step 6: Final answer
    x = 535,135.72

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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.