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Finding the Fourth Proportional to 570,900.91, 787,891.25 and 316,275.79

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Solution

The fourth proportional to 570,900.91, 787,891.25 and 316,275.79 is: 436,487.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,900.91 : 787,891.25 = 316,275.79 : x
  2. Step 2: Convert to fraction form
    570,900.91/787,891.25 = 316,275.79/x
  3. Step 3: Cross multiply
    570,900.91x = 787,891.25 × 316,275.79
  4. Step 4: Simplify right side
    570,900.91x = 249,190,927,527.84
  5. Step 5: Solve for x
    x = 249,190,927,527.84/570,900.91
  6. Step 6: Final answer
    x = 436,487.18

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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.