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Finding the Fourth Proportional to 554,165.20, 764,732.64 and 312,445.63

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Solution

The fourth proportional to 554,165.20, 764,732.64 and 312,445.63 is: 431,166.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,165.20 : 764,732.64 = 312,445.63 : x
  2. Step 2: Convert to fraction form
    554,165.20/764,732.64 = 312,445.63/x
  3. Step 3: Cross multiply
    554,165.20x = 764,732.64 × 312,445.63
  4. Step 4: Simplify right side
    554,165.20x = 238,937,371,486.36
  5. Step 5: Solve for x
    x = 238,937,371,486.36/554,165.20
  6. Step 6: Final answer
    x = 431,166.32

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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.