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Finding the Fourth Proportional to 363,320.84, 545,018.42 and 138,870.20

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Solution

The fourth proportional to 363,320.84, 545,018.42 and 138,870.20 is: 208,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,320.84 : 545,018.42 = 138,870.20 : x
  2. Step 2: Convert to fraction form
    363,320.84/545,018.42 = 138,870.20/x
  3. Step 3: Cross multiply
    363,320.84x = 545,018.42 × 138,870.20
  4. Step 4: Simplify right side
    363,320.84x = 75,686,816,989.08
  5. Step 5: Solve for x
    x = 75,686,816,989.08/363,320.84
  6. Step 6: Final answer
    x = 208,319.50

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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.