Home / 445,334.20-668,001.30-390,038.20

Finding the Fourth Proportional to 445,334.20, 668,001.30 and 390,038.20

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Solution

The fourth proportional to 445,334.20, 668,001.30 and 390,038.20 is: 585,057.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,334.20 : 668,001.30 = 390,038.20 : x
  2. Step 2: Convert to fraction form
    445,334.20/668,001.30 = 390,038.20/x
  3. Step 3: Cross multiply
    445,334.20x = 668,001.30 × 390,038.20
  4. Step 4: Simplify right side
    445,334.20x = 260,546,024,649.66
  5. Step 5: Solve for x
    x = 260,546,024,649.66/445,334.20
  6. Step 6: Final answer
    x = 585,057.30

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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.