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Finding the Fourth Proportional to 612,808.20, 918,434.70 and 545,934.60

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Solution

The fourth proportional to 612,808.20, 918,434.70 and 545,934.60 is: 818,209.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,808.20 : 918,434.70 = 545,934.60 : x
  2. Step 2: Convert to fraction form
    612,808.20/918,434.70 = 545,934.60/x
  3. Step 3: Cross multiply
    612,808.20x = 918,434.70 × 545,934.60
  4. Step 4: Simplify right side
    612,808.20x = 501,405,280,570.62
  5. Step 5: Solve for x
    x = 501,405,280,570.62/612,808.20
  6. Step 6: Final answer
    x = 818,209.16

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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.