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Finding the Fourth Proportional to 570,507.71, 787,312.71 and 312,395.54

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Solution

The fourth proportional to 570,507.71, 787,312.71 and 312,395.54 is: 431,112.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,507.71 : 787,312.71 = 312,395.54 : x
  2. Step 2: Convert to fraction form
    570,507.71/787,312.71 = 312,395.54/x
  3. Step 3: Cross multiply
    570,507.71x = 787,312.71 × 312,395.54
  4. Step 4: Simplify right side
    570,507.71x = 245,952,975,252.75
  5. Step 5: Solve for x
    x = 245,952,975,252.75/570,507.71
  6. Step 6: Final answer
    x = 431,112.45

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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.