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Finding the Fourth Proportional to 390,089.59, 585,246.47 and 162,340.88

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Solution

The fourth proportional to 390,089.59, 585,246.47 and 162,340.88 is: 243,557.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,089.59 : 585,246.47 = 162,340.88 : x
  2. Step 2: Convert to fraction form
    390,089.59/585,246.47 = 162,340.88/x
  3. Step 3: Cross multiply
    390,089.59x = 585,246.47 × 162,340.88
  4. Step 4: Simplify right side
    390,089.59x = 95,009,423,218.76
  5. Step 5: Solve for x
    x = 95,009,423,218.76/390,089.59
  6. Step 6: Final answer
    x = 243,557.96

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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.