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Finding the Fourth Proportional to 570,617.48, 787,442.47 and 315,963.20

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Solution

The fourth proportional to 570,617.48, 787,442.47 and 315,963.20 is: 436,023.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,617.48 : 787,442.47 = 315,963.20 : x
  2. Step 2: Convert to fraction form
    570,617.48/787,442.47 = 315,963.20/x
  3. Step 3: Cross multiply
    570,617.48x = 787,442.47 × 315,963.20
  4. Step 4: Simplify right side
    570,617.48x = 248,802,842,637.10
  5. Step 5: Solve for x
    x = 248,802,842,637.10/570,617.48
  6. Step 6: Final answer
    x = 436,023.87

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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.