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Finding the Fourth Proportional to 678,957.80, 1,017,561.90 and 491,750.60

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Solution

The fourth proportional to 678,957.80, 1,017,561.90 and 491,750.60 is: 736,992.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,957.80 : 1,017,561.90 = 491,750.60 : x
  2. Step 2: Convert to fraction form
    678,957.80/1,017,561.90 = 491,750.60/x
  3. Step 3: Cross multiply
    678,957.80x = 1,017,561.90 × 491,750.60
  4. Step 4: Simplify right side
    678,957.80x = 500,386,674,862.14
  5. Step 5: Solve for x
    x = 500,386,674,862.14/678,957.80
  6. Step 6: Final answer
    x = 736,992.31

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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.