Home / 742,319.61-1,113,257.28-387,139.87

Finding the Fourth Proportional to 742,319.61, 1,113,257.28 and 387,139.87

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Solution

The fourth proportional to 742,319.61, 1,113,257.28 and 387,139.87 is: 580,593.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,319.61 : 1,113,257.28 = 387,139.87 : x
  2. Step 2: Convert to fraction form
    742,319.61/1,113,257.28 = 387,139.87/x
  3. Step 3: Cross multiply
    742,319.61x = 1,113,257.28 × 387,139.87
  4. Step 4: Simplify right side
    742,319.61x = 430,986,281,499.10
  5. Step 5: Solve for x
    x = 430,986,281,499.10/742,319.61
  6. Step 6: Final answer
    x = 580,593.96

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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.