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Finding the Fourth Proportional to 545,187.40, 817,781.10 and 278,859.40

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Solution

The fourth proportional to 545,187.40, 817,781.10 and 278,859.40 is: 418,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,187.40 : 817,781.10 = 278,859.40 : x
  2. Step 2: Convert to fraction form
    545,187.40/817,781.10 = 278,859.40/x
  3. Step 3: Cross multiply
    545,187.40x = 817,781.10 × 278,859.40
  4. Step 4: Simplify right side
    545,187.40x = 228,045,946,877.34
  5. Step 5: Solve for x
    x = 228,045,946,877.34/545,187.40
  6. Step 6: Final answer
    x = 418,289.10

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Similar ratio
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1.5x scale

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.