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Finding the Fourth Proportional to 660,542.64, 911,554.20 and 358,738.80

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Solution

The fourth proportional to 660,542.64, 911,554.20 and 358,738.80 is: 495,062.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,542.64 : 911,554.20 = 358,738.80 : x
  2. Step 2: Convert to fraction form
    660,542.64/911,554.20 = 358,738.80/x
  3. Step 3: Cross multiply
    660,542.64x = 911,554.20 × 358,738.80
  4. Step 4: Simplify right side
    660,542.64x = 327,009,859,842.96
  5. Step 5: Solve for x
    x = 327,009,859,842.96/660,542.64
  6. Step 6: Final answer
    x = 495,062.45

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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.