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Finding the Fourth Proportional to 554,150.66, 764,712.63 and 312,431.13

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Solution

The fourth proportional to 554,150.66, 764,712.63 and 312,431.13 is: 431,146.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,150.66 : 764,712.63 = 312,431.13 : x
  2. Step 2: Convert to fraction form
    554,150.66/764,712.63 = 312,431.13/x
  3. Step 3: Cross multiply
    554,150.66x = 764,712.63 × 312,431.13
  4. Step 4: Simplify right side
    554,150.66x = 238,920,031,116.17
  5. Step 5: Solve for x
    x = 238,920,031,116.17/554,150.66
  6. Step 6: Final answer
    x = 431,146.35

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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.