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Finding the Fourth Proportional to 298,689.60, 448,024.80 and 99,019.20

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Solution

The fourth proportional to 298,689.60, 448,024.80 and 99,019.20 is: 148,525.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,689.60 : 448,024.80 = 99,019.20 : x
  2. Step 2: Convert to fraction form
    298,689.60/448,024.80 = 99,019.20/x
  3. Step 3: Cross multiply
    298,689.60x = 448,024.80 × 99,019.20
  4. Step 4: Simplify right side
    298,689.60x = 44,363,057,276.16
  5. Step 5: Solve for x
    x = 44,363,057,276.16/298,689.60
  6. Step 6: Final answer
    x = 148,525.62

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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.