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Finding the Fourth Proportional to 440,160.40, 659,657.40 and 390,005.20

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Solution

The fourth proportional to 440,160.40, 659,657.40 and 390,005.20 is: 584,491.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,160.40 : 659,657.40 = 390,005.20 : x
  2. Step 2: Convert to fraction form
    440,160.40/659,657.40 = 390,005.20/x
  3. Step 3: Cross multiply
    440,160.40x = 659,657.40 × 390,005.20
  4. Step 4: Simplify right side
    440,160.40x = 257,269,816,218.48
  5. Step 5: Solve for x
    x = 257,269,816,218.48/440,160.40
  6. Step 6: Final answer
    x = 584,491.05

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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.