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Finding the Fourth Proportional to 660,756.74, 911,839.29 and 358,952.90

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Solution

The fourth proportional to 660,756.74, 911,839.29 and 358,952.90 is: 495,352.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,756.74 : 911,839.29 = 358,952.90 : x
  2. Step 2: Convert to fraction form
    660,756.74/911,839.29 = 358,952.90/x
  3. Step 3: Cross multiply
    660,756.74x = 911,839.29 × 358,952.90
  4. Step 4: Simplify right side
    660,756.74x = 327,307,357,479.44
  5. Step 5: Solve for x
    x = 327,307,357,479.44/660,756.74
  6. Step 6: Final answer
    x = 495,352.28

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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.