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Finding the Fourth Proportional to 545,911.20, 818,089.20 and 402,638.40

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Solution

The fourth proportional to 545,911.20, 818,089.20 and 402,638.40 is: 603,384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,911.20 : 818,089.20 = 402,638.40 : x
  2. Step 2: Convert to fraction form
    545,911.20/818,089.20 = 402,638.40/x
  3. Step 3: Cross multiply
    545,911.20x = 818,089.20 × 402,638.40
  4. Step 4: Simplify right side
    545,911.20x = 329,394,126,545.28
  5. Step 5: Solve for x
    x = 329,394,126,545.28/545,911.20
  6. Step 6: Final answer
    x = 603,384.08

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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.