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Finding the Fourth Proportional to 665,300.79, 918,115.47 and 359,377.17

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Solution

The fourth proportional to 665,300.79, 918,115.47 and 359,377.17 is: 495,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,300.79 : 918,115.47 = 359,377.17 : x
  2. Step 2: Convert to fraction form
    665,300.79/918,115.47 = 359,377.17/x
  3. Step 3: Cross multiply
    665,300.79x = 918,115.47 × 359,377.17
  4. Step 4: Simplify right side
    665,300.79x = 329,949,739,341.82
  5. Step 5: Solve for x
    x = 329,949,739,341.82/665,300.79
  6. Step 6: Final answer
    x = 495,940.70

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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.