Home / 991,501.40-1,486,986.40-430,402.52

Finding the Fourth Proportional to 991,501.40, 1,486,986.40 and 430,402.52

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Solution

The fourth proportional to 991,501.40, 1,486,986.40 and 430,402.52 is: 645,488.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,501.40 : 1,486,986.40 = 430,402.52 : x
  2. Step 2: Convert to fraction form
    991,501.40/1,486,986.40 = 430,402.52/x
  3. Step 3: Cross multiply
    991,501.40x = 1,486,986.40 × 430,402.52
  4. Step 4: Simplify right side
    991,501.40x = 640,002,693,765.73
  5. Step 5: Solve for x
    x = 640,002,693,765.73/991,501.40
  6. Step 6: Final answer
    x = 645,488.44

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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.