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Finding the Fourth Proportional to 570,431.64, 787,205.01 and 312,304.30

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Solution

The fourth proportional to 570,431.64, 787,205.01 and 312,304.30 is: 430,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,431.64 : 787,205.01 = 312,304.30 : x
  2. Step 2: Convert to fraction form
    570,431.64/787,205.01 = 312,304.30/x
  3. Step 3: Cross multiply
    570,431.64x = 787,205.01 × 312,304.30
  4. Step 4: Simplify right side
    570,431.64x = 245,847,509,604.54
  5. Step 5: Solve for x
    x = 245,847,509,604.54/570,431.64
  6. Step 6: Final answer
    x = 430,985.05

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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.