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Finding the Fourth Proportional to 578,412.80, 869,692.80 and 487,174.40

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Solution

The fourth proportional to 578,412.80, 869,692.80 and 487,174.40 is: 732,508.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,412.80 : 869,692.80 = 487,174.40 : x
  2. Step 2: Convert to fraction form
    578,412.80/869,692.80 = 487,174.40/x
  3. Step 3: Cross multiply
    578,412.80x = 869,692.80 × 487,174.40
  4. Step 4: Simplify right side
    578,412.80x = 423,692,068,024.32
  5. Step 5: Solve for x
    x = 423,692,068,024.32/578,412.80
  6. Step 6: Final answer
    x = 732,508.11

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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.