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Finding the Fourth Proportional to 315,800.16, 435,807.27 and 172,560.18

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Solution

The fourth proportional to 315,800.16, 435,807.27 and 172,560.18 is: 238,134.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,800.16 : 435,807.27 = 172,560.18 : x
  2. Step 2: Convert to fraction form
    315,800.16/435,807.27 = 172,560.18/x
  3. Step 3: Cross multiply
    315,800.16x = 435,807.27 × 172,560.18
  4. Step 4: Simplify right side
    315,800.16x = 75,202,980,956.51
  5. Step 5: Solve for x
    x = 75,202,980,956.51/315,800.16
  6. Step 6: Final answer
    x = 238,134.71

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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.