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Finding the Fourth Proportional to 498,130.56, 687,422.40 and 271,780.80

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Solution

The fourth proportional to 498,130.56, 687,422.40 and 271,780.80 is: 375,058.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,130.56 : 687,422.40 = 271,780.80 : x
  2. Step 2: Convert to fraction form
    498,130.56/687,422.40 = 271,780.80/x
  3. Step 3: Cross multiply
    498,130.56x = 687,422.40 × 271,780.80
  4. Step 4: Simplify right side
    498,130.56x = 186,828,209,809.92
  5. Step 5: Solve for x
    x = 186,828,209,809.92/498,130.56
  6. Step 6: Final answer
    x = 375,058.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.