Home / 687,999.60-1,031,124.60-612,766.80

Finding the Fourth Proportional to 687,999.60, 1,031,124.60 and 612,766.80

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Solution

The fourth proportional to 687,999.60, 1,031,124.60 and 612,766.80 is: 918,371.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,999.60 : 1,031,124.60 = 612,766.80 : x
  2. Step 2: Convert to fraction form
    687,999.60/1,031,124.60 = 612,766.80/x
  3. Step 3: Cross multiply
    687,999.60x = 1,031,124.60 × 612,766.80
  4. Step 4: Simplify right side
    687,999.60x = 631,838,921,543.28
  5. Step 5: Solve for x
    x = 631,838,921,543.28/687,999.60
  6. Step 6: Final answer
    x = 918,371.06

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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.