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Finding the Fourth Proportional to 625,689.28, 938,533.90 and 288,630.20

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Solution

The fourth proportional to 625,689.28, 938,533.90 and 288,630.20 is: 432,945.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,689.28 : 938,533.90 = 288,630.20 : x
  2. Step 2: Convert to fraction form
    625,689.28/938,533.90 = 288,630.20/x
  3. Step 3: Cross multiply
    625,689.28x = 938,533.90 × 288,630.20
  4. Step 4: Simplify right side
    625,689.28x = 270,889,225,820.63
  5. Step 5: Solve for x
    x = 270,889,225,820.63/625,689.28
  6. Step 6: Final answer
    x = 432,945.29

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.