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Finding the Fourth Proportional to 539,474.40, 808,520.40 and 480,031.20

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Solution

The fourth proportional to 539,474.40, 808,520.40 and 480,031.20 is: 719,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,474.40 : 808,520.40 = 480,031.20 : x
  2. Step 2: Convert to fraction form
    539,474.40/808,520.40 = 480,031.20/x
  3. Step 3: Cross multiply
    539,474.40x = 808,520.40 × 480,031.20
  4. Step 4: Simplify right side
    539,474.40x = 388,115,017,836.48
  5. Step 5: Solve for x
    x = 388,115,017,836.48/539,474.40
  6. Step 6: Final answer
    x = 719,431.76

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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.