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Finding the Fourth Proportional to 508,908.20, 763,362.30 and 430,176.20

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Solution

The fourth proportional to 508,908.20, 763,362.30 and 430,176.20 is: 645,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,908.20 : 763,362.30 = 430,176.20 : x
  2. Step 2: Convert to fraction form
    508,908.20/763,362.30 = 430,176.20/x
  3. Step 3: Cross multiply
    508,908.20x = 763,362.30 × 430,176.20
  4. Step 4: Simplify right side
    508,908.20x = 328,380,293,437.26
  5. Step 5: Solve for x
    x = 328,380,293,437.26/508,908.20
  6. Step 6: Final answer
    x = 645,264.30

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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.