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Finding the Fourth Proportional to 775,415.80, 1,070,020.82 and 469,661.88

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Solution

The fourth proportional to 775,415.80, 1,070,020.82 and 469,661.88 is: 648,101.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    775,415.80 : 1,070,020.82 = 469,661.88 : x
  2. Step 2: Convert to fraction form
    775,415.80/1,070,020.82 = 469,661.88/x
  3. Step 3: Cross multiply
    775,415.80x = 1,070,020.82 × 469,661.88
  4. Step 4: Simplify right side
    775,415.80x = 502,547,989,960.34
  5. Step 5: Solve for x
    x = 502,547,989,960.34/775,415.80
  6. Step 6: Final answer
    x = 648,101.30

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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.