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Finding the Fourth Proportional to 545,210.20, 817,815.30 and 520,715.80

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Solution

The fourth proportional to 545,210.20, 817,815.30 and 520,715.80 is: 781,073.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,210.20 : 817,815.30 = 520,715.80 : x
  2. Step 2: Convert to fraction form
    545,210.20/817,815.30 = 520,715.80/x
  3. Step 3: Cross multiply
    545,210.20x = 817,815.30 × 520,715.80
  4. Step 4: Simplify right side
    545,210.20x = 425,849,348,191.74
  5. Step 5: Solve for x
    x = 425,849,348,191.74/545,210.20
  6. Step 6: Final answer
    x = 781,073.70

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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.