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Finding the Fourth Proportional to 609,017.70, 840,613.11 and 354,417.90

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Solution

The fourth proportional to 609,017.70, 840,613.11 and 354,417.90 is: 489,194.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,017.70 : 840,613.11 = 354,417.90 : x
  2. Step 2: Convert to fraction form
    609,017.70/840,613.11 = 354,417.90/x
  3. Step 3: Cross multiply
    609,017.70x = 840,613.11 × 354,417.90
  4. Step 4: Simplify right side
    609,017.70x = 297,928,333,158.67
  5. Step 5: Solve for x
    x = 297,928,333,158.67/609,017.70
  6. Step 6: Final answer
    x = 489,194.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.