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Finding the Fourth Proportional to 521,528.60, 721,025.68 and 385,347.76

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Solution

The fourth proportional to 521,528.60, 721,025.68 and 385,347.76 is: 532,752.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,528.60 : 721,025.68 = 385,347.76 : x
  2. Step 2: Convert to fraction form
    521,528.60/721,025.68 = 385,347.76/x
  3. Step 3: Cross multiply
    521,528.60x = 721,025.68 × 385,347.76
  4. Step 4: Simplify right side
    521,528.60x = 277,845,630,690.48
  5. Step 5: Solve for x
    x = 277,845,630,690.48/521,528.60
  6. Step 6: Final answer
    x = 532,752.43

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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.