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Finding the Fourth Proportional to 518,721.70, 778,082.55 and 144,744.70

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Solution

The fourth proportional to 518,721.70, 778,082.55 and 144,744.70 is: 217,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,721.70 : 778,082.55 = 144,744.70 : x
  2. Step 2: Convert to fraction form
    518,721.70/778,082.55 = 144,744.70/x
  3. Step 3: Cross multiply
    518,721.70x = 778,082.55 × 144,744.70
  4. Step 4: Simplify right side
    518,721.70x = 112,623,325,274.99
  5. Step 5: Solve for x
    x = 112,623,325,274.99/518,721.70
  6. Step 6: Final answer
    x = 217,117.05

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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.