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Finding the Fourth Proportional to 554,156.66, 764,720.91 and 312,437.13

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Solution

The fourth proportional to 554,156.66, 764,720.91 and 312,437.13 is: 431,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,156.66 : 764,720.91 = 312,437.13 : x
  2. Step 2: Convert to fraction form
    554,156.66/764,720.91 = 312,437.13/x
  3. Step 3: Cross multiply
    554,156.66x = 764,720.91 × 312,437.13
  4. Step 4: Simplify right side
    554,156.66x = 238,927,206,371.39
  5. Step 5: Solve for x
    x = 238,927,206,371.39/554,156.66
  6. Step 6: Final answer
    x = 431,154.63

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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.