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Finding the Fourth Proportional to 518,077.52, 777,080.58 and 318,428.72

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Solution

The fourth proportional to 518,077.52, 777,080.58 and 318,428.72 is: 477,621.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,077.52 : 777,080.58 = 318,428.72 : x
  2. Step 2: Convert to fraction form
    518,077.52/777,080.58 = 318,428.72/x
  3. Step 3: Cross multiply
    518,077.52x = 777,080.58 × 318,428.72
  4. Step 4: Simplify right side
    518,077.52x = 247,444,774,426.26
  5. Step 5: Solve for x
    x = 247,444,774,426.26/518,077.52
  6. Step 6: Final answer
    x = 477,621.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.