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Finding the Fourth Proportional to 642,897.57, 887,220.26 and 356,400.57

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Solution

The fourth proportional to 642,897.57, 887,220.26 and 356,400.57 is: 491,844.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,897.57 : 887,220.26 = 356,400.57 : x
  2. Step 2: Convert to fraction form
    642,897.57/887,220.26 = 356,400.57/x
  3. Step 3: Cross multiply
    642,897.57x = 887,220.26 × 356,400.57
  4. Step 4: Simplify right side
    642,897.57x = 316,205,804,597.55
  5. Step 5: Solve for x
    x = 316,205,804,597.55/642,897.57
  6. Step 6: Final answer
    x = 491,844.77

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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.