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Finding the Fourth Proportional to 665,302.32, 918,117.54 and 359,378.69

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Solution

The fourth proportional to 665,302.32, 918,117.54 and 359,378.69 is: 495,942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,302.32 : 918,117.54 = 359,378.69 : x
  2. Step 2: Convert to fraction form
    665,302.32/918,117.54 = 359,378.69/x
  3. Step 3: Cross multiply
    665,302.32x = 918,117.54 × 359,378.69
  4. Step 4: Simplify right side
    665,302.32x = 329,951,878,791.22
  5. Step 5: Solve for x
    x = 329,951,878,791.22/665,302.32
  6. Step 6: Final answer
    x = 495,942.77

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Double scale
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Similar ratio
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1.5x scale

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.