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Finding the Fourth Proportional to 791,402.40, 1,187,978.40 and 492,220.80

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Solution

The fourth proportional to 791,402.40, 1,187,978.40 and 492,220.80 is: 738,875.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,402.40 : 1,187,978.40 = 492,220.80 : x
  2. Step 2: Convert to fraction form
    791,402.40/1,187,978.40 = 492,220.80/x
  3. Step 3: Cross multiply
    791,402.40x = 1,187,978.40 × 492,220.80
  4. Step 4: Simplify right side
    791,402.40x = 584,747,678,430.72
  5. Step 5: Solve for x
    x = 584,747,678,430.72/791,402.40
  6. Step 6: Final answer
    x = 738,875.29

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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.