Home / 690,920.40-1,036,380.60-490,153.80

Finding the Fourth Proportional to 690,920.40, 1,036,380.60 and 490,153.80

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Solution

The fourth proportional to 690,920.40, 1,036,380.60 and 490,153.80 is: 735,230.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,920.40 : 1,036,380.60 = 490,153.80 : x
  2. Step 2: Convert to fraction form
    690,920.40/1,036,380.60 = 490,153.80/x
  3. Step 3: Cross multiply
    690,920.40x = 1,036,380.60 × 490,153.80
  4. Step 4: Simplify right side
    690,920.40x = 507,985,889,336.28
  5. Step 5: Solve for x
    x = 507,985,889,336.28/690,920.40
  6. Step 6: Final answer
    x = 735,230.70

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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.