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Finding the Fourth Proportional to 570,881.28, 787,816.10 and 312,767.38

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Solution

The fourth proportional to 570,881.28, 787,816.10 and 312,767.38 is: 431,618.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,881.28 : 787,816.10 = 312,767.38 : x
  2. Step 2: Convert to fraction form
    570,881.28/787,816.10 = 312,767.38/x
  3. Step 3: Cross multiply
    570,881.28x = 787,816.10 × 312,767.38
  4. Step 4: Simplify right side
    570,881.28x = 246,403,177,518.82
  5. Step 5: Solve for x
    x = 246,403,177,518.82/570,881.28
  6. Step 6: Final answer
    x = 431,618.95

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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.