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Finding the Fourth Proportional to 390,412.86, 585,567.45 and 109,951.98

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Solution

The fourth proportional to 390,412.86, 585,567.45 and 109,951.98 is: 164,913.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,412.86 : 585,567.45 = 109,951.98 : x
  2. Step 2: Convert to fraction form
    390,412.86/585,567.45 = 109,951.98/x
  3. Step 3: Cross multiply
    390,412.86x = 585,567.45 × 109,951.98
  4. Step 4: Simplify right side
    390,412.86x = 64,384,300,551.05
  5. Step 5: Solve for x
    x = 64,384,300,551.05/390,412.86
  6. Step 6: Final answer
    x = 164,913.37

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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.