Home / 280,631.60-420,655.80-154,077.20

Finding the Fourth Proportional to 280,631.60, 420,655.80 and 154,077.20

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Solution

The fourth proportional to 280,631.60, 420,655.80 and 154,077.20 is: 230,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,631.60 : 420,655.80 = 154,077.20 : x
  2. Step 2: Convert to fraction form
    280,631.60/420,655.80 = 154,077.20/x
  3. Step 3: Cross multiply
    280,631.60x = 420,655.80 × 154,077.20
  4. Step 4: Simplify right side
    280,631.60x = 64,813,467,827.76
  5. Step 5: Solve for x
    x = 64,813,467,827.76/280,631.60
  6. Step 6: Final answer
    x = 230,955.70

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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.