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Finding the Fourth Proportional to 390,607.86, 584,956.32 and 352,742.70

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Solution

The fourth proportional to 390,607.86, 584,956.32 and 352,742.70 is: 528,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,607.86 : 584,956.32 = 352,742.70 : x
  2. Step 2: Convert to fraction form
    390,607.86/584,956.32 = 352,742.70/x
  3. Step 3: Cross multiply
    390,607.86x = 584,956.32 × 352,742.70
  4. Step 4: Simplify right side
    390,607.86x = 206,339,071,698.86
  5. Step 5: Solve for x
    x = 206,339,071,698.86/390,607.86
  6. Step 6: Final answer
    x = 528,251.20

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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.