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Finding the Fourth Proportional to 570,764.07, 787,654.53 and 312,642.18

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Solution

The fourth proportional to 570,764.07, 787,654.53 and 312,642.18 is: 431,446.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,764.07 : 787,654.53 = 312,642.18 : x
  2. Step 2: Convert to fraction form
    570,764.07/787,654.53 = 312,642.18/x
  3. Step 3: Cross multiply
    570,764.07x = 787,654.53 × 312,642.18
  4. Step 4: Simplify right side
    570,764.07x = 246,254,029,346.08
  5. Step 5: Solve for x
    x = 246,254,029,346.08/570,764.07
  6. Step 6: Final answer
    x = 431,446.27

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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.