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Finding the Fourth Proportional to 978,689.64, 1,350,575.40 and 571,028.52

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Solution

The fourth proportional to 978,689.64, 1,350,575.40 and 571,028.52 is: 788,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,689.64 : 1,350,575.40 = 571,028.52 : x
  2. Step 2: Convert to fraction form
    978,689.64/1,350,575.40 = 571,028.52/x
  3. Step 3: Cross multiply
    978,689.64x = 1,350,575.40 × 571,028.52
  4. Step 4: Simplify right side
    978,689.64x = 771,217,071,810.41
  5. Step 5: Solve for x
    x = 771,217,071,810.41/978,689.64
  6. Step 6: Final answer
    x = 788,009.85

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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.