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Finding the Fourth Proportional to 1,070.64, 1,477.80 and 677.93

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Solution

The fourth proportional to 1,070.64, 1,477.80 and 677.93 is: 935.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.64 : 1,477.80 = 677.93 : x
  2. Step 2: Convert to fraction form
    1,070.64/1,477.80 = 677.93/x
  3. Step 3: Cross multiply
    1,070.64x = 1,477.80 × 677.93
  4. Step 4: Simplify right side
    1,070.64x = 1,001,837.57
  5. Step 5: Solve for x
    x = 1,001,837.57/1,070.64
  6. Step 6: Final answer
    x = 935.74

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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.