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Finding the Fourth Proportional to 660,915.32, 912,068.70 and 359,109.32

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Solution

The fourth proportional to 660,915.32, 912,068.70 and 359,109.32 is: 495,573.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,915.32 : 912,068.70 = 359,109.32 : x
  2. Step 2: Convert to fraction form
    660,915.32/912,068.70 = 359,109.32/x
  3. Step 3: Cross multiply
    660,915.32x = 912,068.70 × 359,109.32
  4. Step 4: Simplify right side
    660,915.32x = 327,532,370,650.28
  5. Step 5: Solve for x
    x = 327,532,370,650.28/660,915.32
  6. Step 6: Final answer
    x = 495,573.88

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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.