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Finding the Fourth Proportional to 386,677.76, 533,618.94 and 216,915.52

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Solution

The fourth proportional to 386,677.76, 533,618.94 and 216,915.52 is: 299,345.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,677.76 : 533,618.94 = 216,915.52 : x
  2. Step 2: Convert to fraction form
    386,677.76/533,618.94 = 216,915.52/x
  3. Step 3: Cross multiply
    386,677.76x = 533,618.94 × 216,915.52
  4. Step 4: Simplify right side
    386,677.76x = 115,750,229,851.95
  5. Step 5: Solve for x
    x = 115,750,229,851.95/386,677.76
  6. Step 6: Final answer
    x = 299,345.45

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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.