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Finding the Fourth Proportional to 653,658.28, 902,146.62 and 399,156.28

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Solution

The fourth proportional to 653,658.28, 902,146.62 and 399,156.28 is: 550,895.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,658.28 : 902,146.62 = 399,156.28 : x
  2. Step 2: Convert to fraction form
    653,658.28/902,146.62 = 399,156.28/x
  3. Step 3: Cross multiply
    653,658.28x = 902,146.62 × 399,156.28
  4. Step 4: Simplify right side
    653,658.28x = 360,097,488,853.77
  5. Step 5: Solve for x
    x = 360,097,488,853.77/653,658.28
  6. Step 6: Final answer
    x = 550,895.63

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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.