Home / 658,638.20-987,374.10-434,106.20

Finding the Fourth Proportional to 658,638.20, 987,374.10 and 434,106.20

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Solution

The fourth proportional to 658,638.20, 987,374.10 and 434,106.20 is: 650,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,638.20 : 987,374.10 = 434,106.20 : x
  2. Step 2: Convert to fraction form
    658,638.20/987,374.10 = 434,106.20/x
  3. Step 3: Cross multiply
    658,638.20x = 987,374.10 × 434,106.20
  4. Step 4: Simplify right side
    658,638.20x = 428,625,218,529.42
  5. Step 5: Solve for x
    x = 428,625,218,529.42/658,638.20
  6. Step 6: Final answer
    x = 650,774.91

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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.