Home / 665,721.32-918,711.60-404,079.58

Finding the Fourth Proportional to 665,721.32, 918,711.60 and 404,079.58

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Solution

The fourth proportional to 665,721.32, 918,711.60 and 404,079.58 is: 557,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,721.32 : 918,711.60 = 404,079.58 : x
  2. Step 2: Convert to fraction form
    665,721.32/918,711.60 = 404,079.58/x
  3. Step 3: Cross multiply
    665,721.32x = 918,711.60 × 404,079.58
  4. Step 4: Simplify right side
    665,721.32x = 371,232,592,875.57
  5. Step 5: Solve for x
    x = 371,232,592,875.57/665,721.32
  6. Step 6: Final answer
    x = 557,639.63

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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.