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Finding the Fourth Proportional to 545,779.80, 818,669.70 and 542,280.60

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Solution

The fourth proportional to 545,779.80, 818,669.70 and 542,280.60 is: 813,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,779.80 : 818,669.70 = 542,280.60 : x
  2. Step 2: Convert to fraction form
    545,779.80/818,669.70 = 542,280.60/x
  3. Step 3: Cross multiply
    545,779.80x = 818,669.70 × 542,280.60
  4. Step 4: Simplify right side
    545,779.80x = 443,948,696,117.82
  5. Step 5: Solve for x
    x = 443,948,696,117.82/545,779.80
  6. Step 6: Final answer
    x = 813,420.90

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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.