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Finding the Fourth Proportional to 663,098.40, 915,040.80 and 361,292.40

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Solution

The fourth proportional to 663,098.40, 915,040.80 and 361,292.40 is: 498,564.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,098.40 : 915,040.80 = 361,292.40 : x
  2. Step 2: Convert to fraction form
    663,098.40/915,040.80 = 361,292.40/x
  3. Step 3: Cross multiply
    663,098.40x = 915,040.80 × 361,292.40
  4. Step 4: Simplify right side
    663,098.40x = 330,597,286,729.92
  5. Step 5: Solve for x
    x = 330,597,286,729.92/663,098.40
  6. Step 6: Final answer
    x = 498,564.45

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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.