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Finding the Fourth Proportional to 978,534.16, 1,349,127.36 and 633,761.04

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Solution

The fourth proportional to 978,534.16, 1,349,127.36 and 633,761.04 is: 873,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,534.16 : 1,349,127.36 = 633,761.04 : x
  2. Step 2: Convert to fraction form
    978,534.16/1,349,127.36 = 633,761.04/x
  3. Step 3: Cross multiply
    978,534.16x = 1,349,127.36 × 633,761.04
  4. Step 4: Simplify right side
    978,534.16x = 855,024,358,766.06
  5. Step 5: Solve for x
    x = 855,024,358,766.06/978,534.16
  6. Step 6: Final answer
    x = 873,780.80

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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.