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Finding the Fourth Proportional to 545,110.20, 817,811.10 and 387,646.20

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Solution

The fourth proportional to 545,110.20, 817,811.10 and 387,646.20 is: 581,572.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,110.20 : 817,811.10 = 387,646.20 : x
  2. Step 2: Convert to fraction form
    545,110.20/817,811.10 = 387,646.20/x
  3. Step 3: Cross multiply
    545,110.20x = 817,811.10 × 387,646.20
  4. Step 4: Simplify right side
    545,110.20x = 317,021,365,232.82
  5. Step 5: Solve for x
    x = 317,021,365,232.82/545,110.20
  6. Step 6: Final answer
    x = 581,572.98

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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.