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Finding the Fourth Proportional to 554,000.24, 764,509.56 and 312,278.22

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Solution

The fourth proportional to 554,000.24, 764,509.56 and 312,278.22 is: 430,937.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,000.24 : 764,509.56 = 312,278.22 : x
  2. Step 2: Convert to fraction form
    554,000.24/764,509.56 = 312,278.22/x
  3. Step 3: Cross multiply
    554,000.24x = 764,509.56 × 312,278.22
  4. Step 4: Simplify right side
    554,000.24x = 238,739,684,569.78
  5. Step 5: Solve for x
    x = 238,739,684,569.78/554,000.24
  6. Step 6: Final answer
    x = 430,937.88

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Double scale
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Similar ratio
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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.