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Finding the Fourth Proportional to 390,950.12, 586,499.52 and 134,714.72

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Solution

The fourth proportional to 390,950.12, 586,499.52 and 134,714.72 is: 202,097.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,950.12 : 586,499.52 = 134,714.72 : x
  2. Step 2: Convert to fraction form
    390,950.12/586,499.52 = 134,714.72/x
  3. Step 3: Cross multiply
    390,950.12x = 586,499.52 × 134,714.72
  4. Step 4: Simplify right side
    390,950.12x = 79,010,118,616.93
  5. Step 5: Solve for x
    x = 79,010,118,616.93/390,950.12
  6. Step 6: Final answer
    x = 202,097.70

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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.