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Finding the Fourth Proportional to 280,030.42, 418,260.11 and 253,335.16

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Solution

The fourth proportional to 280,030.42, 418,260.11 and 253,335.16 is: 378,387.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,030.42 : 418,260.11 = 253,335.16 : x
  2. Step 2: Convert to fraction form
    280,030.42/418,260.11 = 253,335.16/x
  3. Step 3: Cross multiply
    280,030.42x = 418,260.11 × 253,335.16
  4. Step 4: Simplify right side
    280,030.42x = 105,959,991,888.47
  5. Step 5: Solve for x
    x = 105,959,991,888.47/280,030.42
  6. Step 6: Final answer
    x = 378,387.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.