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Finding the Fourth Proportional to 353,595.95, 487,742.06 and 215,711.88

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Solution

The fourth proportional to 353,595.95, 487,742.06 and 215,711.88 is: 297,547.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,595.95 : 487,742.06 = 215,711.88 : x
  2. Step 2: Convert to fraction form
    353,595.95/487,742.06 = 215,711.88/x
  3. Step 3: Cross multiply
    353,595.95x = 487,742.06 × 215,711.88
  4. Step 4: Simplify right side
    353,595.95x = 105,211,754,214.54
  5. Step 5: Solve for x
    x = 105,211,754,214.54/353,595.95
  6. Step 6: Final answer
    x = 297,547.96

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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.