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Finding the Fourth Proportional to 508,853.70, 763,280.55 and 260,021.70

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Solution

The fourth proportional to 508,853.70, 763,280.55 and 260,021.70 is: 390,032.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,853.70 : 763,280.55 = 260,021.70 : x
  2. Step 2: Convert to fraction form
    508,853.70/763,280.55 = 260,021.70/x
  3. Step 3: Cross multiply
    508,853.70x = 763,280.55 × 260,021.70
  4. Step 4: Simplify right side
    508,853.70x = 198,469,506,187.94
  5. Step 5: Solve for x
    x = 198,469,506,187.94/508,853.70
  6. Step 6: Final answer
    x = 390,032.55

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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.