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Finding the Fourth Proportional to 402,480.70, 603,721.05 and 360,490.30

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Solution

The fourth proportional to 402,480.70, 603,721.05 and 360,490.30 is: 540,735.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,480.70 : 603,721.05 = 360,490.30 : x
  2. Step 2: Convert to fraction form
    402,480.70/603,721.05 = 360,490.30/x
  3. Step 3: Cross multiply
    402,480.70x = 603,721.05 × 360,490.30
  4. Step 4: Simplify right side
    402,480.70x = 217,635,582,430.82
  5. Step 5: Solve for x
    x = 217,635,582,430.82/402,480.70
  6. Step 6: Final answer
    x = 540,735.45

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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.