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Finding the Fourth Proportional to 665,722.32, 918,712.98 and 404,080.58

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Solution

The fourth proportional to 665,722.32, 918,712.98 and 404,080.58 is: 557,641.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,722.32 : 918,712.98 = 404,080.58 : x
  2. Step 2: Convert to fraction form
    665,722.32/918,712.98 = 404,080.58/x
  3. Step 3: Cross multiply
    665,722.32x = 918,712.98 × 404,080.58
  4. Step 4: Simplify right side
    665,722.32x = 371,234,069,218.36
  5. Step 5: Solve for x
    x = 371,234,069,218.36/665,722.32
  6. Step 6: Final answer
    x = 557,641.01

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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.