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Finding the Fourth Proportional to 384,862.80, 577,985.40 and 372,421.20

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Solution

The fourth proportional to 384,862.80, 577,985.40 and 372,421.20 is: 559,300.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,862.80 : 577,985.40 = 372,421.20 : x
  2. Step 2: Convert to fraction form
    384,862.80/577,985.40 = 372,421.20/x
  3. Step 3: Cross multiply
    384,862.80x = 577,985.40 × 372,421.20
  4. Step 4: Simplify right side
    384,862.80x = 215,254,016,250.48
  5. Step 5: Solve for x
    x = 215,254,016,250.48/384,862.80
  6. Step 6: Final answer
    x = 559,300.66

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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.