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Finding the Fourth Proportional to 660,595.74, 911,617.11 and 358,791.90

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Solution

The fourth proportional to 660,595.74, 911,617.11 and 358,791.90 is: 495,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,595.74 : 911,617.11 = 358,791.90 : x
  2. Step 2: Convert to fraction form
    660,595.74/911,617.11 = 358,791.90/x
  3. Step 3: Cross multiply
    660,595.74x = 911,617.11 × 358,791.90
  4. Step 4: Simplify right side
    660,595.74x = 327,080,834,969.41
  5. Step 5: Solve for x
    x = 327,080,834,969.41/660,595.74
  6. Step 6: Final answer
    x = 495,130.10

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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.