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Finding the Fourth Proportional to 570,429.64, 787,202.25 and 312,302.30

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Solution

The fourth proportional to 570,429.64, 787,202.25 and 312,302.30 is: 430,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,429.64 : 787,202.25 = 312,302.30 : x
  2. Step 2: Convert to fraction form
    570,429.64/787,202.25 = 312,302.30/x
  3. Step 3: Cross multiply
    570,429.64x = 787,202.25 × 312,302.30
  4. Step 4: Simplify right side
    570,429.64x = 245,845,073,240.18
  5. Step 5: Solve for x
    x = 245,845,073,240.18/570,429.64
  6. Step 6: Final answer
    x = 430,982.30

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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.