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Finding the Fourth Proportional to 353,344.68, 487,528.47 and 217,400.76

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Solution

The fourth proportional to 353,344.68, 487,528.47 and 217,400.76 is: 299,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,344.68 : 487,528.47 = 217,400.76 : x
  2. Step 2: Convert to fraction form
    353,344.68/487,528.47 = 217,400.76/x
  3. Step 3: Cross multiply
    353,344.68x = 487,528.47 × 217,400.76
  4. Step 4: Simplify right side
    353,344.68x = 105,989,059,899.64
  5. Step 5: Solve for x
    x = 105,989,059,899.64/353,344.68
  6. Step 6: Final answer
    x = 299,959.40

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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.