Home / 687,945.60-1,031,043.60-612,712.80

Finding the Fourth Proportional to 687,945.60, 1,031,043.60 and 612,712.80

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Solution

The fourth proportional to 687,945.60, 1,031,043.60 and 612,712.80 is: 918,290.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,945.60 : 1,031,043.60 = 612,712.80 : x
  2. Step 2: Convert to fraction form
    687,945.60/1,031,043.60 = 612,712.80/x
  3. Step 3: Cross multiply
    687,945.60x = 1,031,043.60 × 612,712.80
  4. Step 4: Simplify right side
    687,945.60x = 631,733,611,078.08
  5. Step 5: Solve for x
    x = 631,733,611,078.08/687,945.60
  6. Step 6: Final answer
    x = 918,290.07

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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.