Home / 690,909.40-1,036,364.10-490,142.80

Finding the Fourth Proportional to 690,909.40, 1,036,364.10 and 490,142.80

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Solution

The fourth proportional to 690,909.40, 1,036,364.10 and 490,142.80 is: 735,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,909.40 : 1,036,364.10 = 490,142.80 : x
  2. Step 2: Convert to fraction form
    690,909.40/1,036,364.10 = 490,142.80/x
  3. Step 3: Cross multiply
    690,909.40x = 1,036,364.10 × 490,142.80
  4. Step 4: Simplify right side
    690,909.40x = 507,966,401,793.48
  5. Step 5: Solve for x
    x = 507,966,401,793.48/690,909.40
  6. Step 6: Final answer
    x = 735,214.20

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Double scale
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Similar ratio
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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.