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Finding the Fourth Proportional to 278,139.40, 417,209.10 and 151,730.80

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Solution

The fourth proportional to 278,139.40, 417,209.10 and 151,730.80 is: 227,596.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,139.40 : 417,209.10 = 151,730.80 : x
  2. Step 2: Convert to fraction form
    278,139.40/417,209.10 = 151,730.80/x
  3. Step 3: Cross multiply
    278,139.40x = 417,209.10 × 151,730.80
  4. Step 4: Simplify right side
    278,139.40x = 63,303,470,510.28
  5. Step 5: Solve for x
    x = 63,303,470,510.28/278,139.40
  6. Step 6: Final answer
    x = 227,596.20

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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.