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Finding the Fourth Proportional to 554,053.20, 764,660.76 and 312,382.32

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Solution

The fourth proportional to 554,053.20, 764,660.76 and 312,382.32 is: 431,125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,053.20 : 764,660.76 = 312,382.32 : x
  2. Step 2: Convert to fraction form
    554,053.20/764,660.76 = 312,382.32/x
  3. Step 3: Cross multiply
    554,053.20x = 764,660.76 × 312,382.32
  4. Step 4: Simplify right side
    554,053.20x = 238,866,502,221.76
  5. Step 5: Solve for x
    x = 238,866,502,221.76/554,053.20
  6. Step 6: Final answer
    x = 431,125.57

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Half scale
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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.