Home / 712,420.90-1,068,299.16-412,987.12

Finding the Fourth Proportional to 712,420.90, 1,068,299.16 and 412,987.12

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Solution

The fourth proportional to 712,420.90, 1,068,299.16 and 412,987.12 is: 619,288.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,420.90 : 1,068,299.16 = 412,987.12 : x
  2. Step 2: Convert to fraction form
    712,420.90/1,068,299.16 = 412,987.12/x
  3. Step 3: Cross multiply
    712,420.90x = 1,068,299.16 × 412,987.12
  4. Step 4: Simplify right side
    712,420.90x = 441,193,793,386.82
  5. Step 5: Solve for x
    x = 441,193,793,386.82/712,420.90
  6. Step 6: Final answer
    x = 619,288.11

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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.