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Finding the Fourth Proportional to 514,663.20, 771,994.80 and 140,686.20

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Solution

The fourth proportional to 514,663.20, 771,994.80 and 140,686.20 is: 211,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,663.20 : 771,994.80 = 140,686.20 : x
  2. Step 2: Convert to fraction form
    514,663.20/771,994.80 = 140,686.20/x
  3. Step 3: Cross multiply
    514,663.20x = 771,994.80 × 140,686.20
  4. Step 4: Simplify right side
    514,663.20x = 108,609,014,831.76
  5. Step 5: Solve for x
    x = 108,609,014,831.76/514,663.20
  6. Step 6: Final answer
    x = 211,029.30

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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.