Home / 690,920.90-1,036,381.35-490,154.30

Finding the Fourth Proportional to 690,920.90, 1,036,381.35 and 490,154.30

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Solution

The fourth proportional to 690,920.90, 1,036,381.35 and 490,154.30 is: 735,231.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,920.90 : 1,036,381.35 = 490,154.30 : x
  2. Step 2: Convert to fraction form
    690,920.90/1,036,381.35 = 490,154.30/x
  3. Step 3: Cross multiply
    690,920.90x = 1,036,381.35 × 490,154.30
  4. Step 4: Simplify right side
    690,920.90x = 507,986,775,142.31
  5. Step 5: Solve for x
    x = 507,986,775,142.31/690,920.90
  6. Step 6: Final answer
    x = 735,231.45

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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.