Home / 687,729.60-1,031,594.40-538,430.40

Finding the Fourth Proportional to 687,729.60, 1,031,594.40 and 538,430.40

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Solution

The fourth proportional to 687,729.60, 1,031,594.40 and 538,430.40 is: 807,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,729.60 : 1,031,594.40 = 538,430.40 : x
  2. Step 2: Convert to fraction form
    687,729.60/1,031,594.40 = 538,430.40/x
  3. Step 3: Cross multiply
    687,729.60x = 1,031,594.40 × 538,430.40
  4. Step 4: Simplify right side
    687,729.60x = 555,441,785,429.76
  5. Step 5: Solve for x
    x = 555,441,785,429.76/687,729.60
  6. Step 6: Final answer
    x = 807,645.60

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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.