Home / 690,908.90-1,036,363.35-490,142.30

Finding the Fourth Proportional to 690,908.90, 1,036,363.35 and 490,142.30

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Solution

The fourth proportional to 690,908.90, 1,036,363.35 and 490,142.30 is: 735,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,908.90 : 1,036,363.35 = 490,142.30 : x
  2. Step 2: Convert to fraction form
    690,908.90/1,036,363.35 = 490,142.30/x
  3. Step 3: Cross multiply
    690,908.90x = 1,036,363.35 × 490,142.30
  4. Step 4: Simplify right side
    690,908.90x = 507,965,516,004.71
  5. Step 5: Solve for x
    x = 507,965,516,004.71/690,908.90
  6. Step 6: Final answer
    x = 735,213.45

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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.