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Finding the Fourth Proportional to 478,624.80, 717,281.10 and 390,051.30

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Solution

The fourth proportional to 478,624.80, 717,281.10 and 390,051.30 is: 584,542.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,624.80 : 717,281.10 = 390,051.30 : x
  2. Step 2: Convert to fraction form
    478,624.80/717,281.10 = 390,051.30/x
  3. Step 3: Cross multiply
    478,624.80x = 717,281.10 × 390,051.30
  4. Step 4: Simplify right side
    478,624.80x = 279,776,425,520.43
  5. Step 5: Solve for x
    x = 279,776,425,520.43/478,624.80
  6. Step 6: Final answer
    x = 584,542.27

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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.