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Finding the Fourth Proportional to 478,420.40, 717,727.80 and 162,909.20

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Solution

The fourth proportional to 478,420.40, 717,727.80 and 162,909.20 is: 244,396.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,420.40 : 717,727.80 = 162,909.20 : x
  2. Step 2: Convert to fraction form
    478,420.40/717,727.80 = 162,909.20/x
  3. Step 3: Cross multiply
    478,420.40x = 717,727.80 × 162,909.20
  4. Step 4: Simplify right side
    478,420.40x = 116,924,461,715.76
  5. Step 5: Solve for x
    x = 116,924,461,715.76/478,420.40
  6. Step 6: Final answer
    x = 244,396.90

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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.