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Finding the Fourth Proportional to 642,897.54, 887,219.64 and 356,444.28

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Solution

The fourth proportional to 642,897.54, 887,219.64 and 356,444.28 is: 491,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,897.54 : 887,219.64 = 356,444.28 : x
  2. Step 2: Convert to fraction form
    642,897.54/887,219.64 = 356,444.28/x
  3. Step 3: Cross multiply
    642,897.54x = 887,219.64 × 356,444.28
  4. Step 4: Simplify right side
    642,897.54x = 316,244,365,781.66
  5. Step 5: Solve for x
    x = 316,244,365,781.66/642,897.54
  6. Step 6: Final answer
    x = 491,904.77

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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.