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Finding the Fourth Proportional to 315,510.02, 435,400.53 and 172,269.62

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Solution

The fourth proportional to 315,510.02, 435,400.53 and 172,269.62 is: 237,730.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,510.02 : 435,400.53 = 172,269.62 : x
  2. Step 2: Convert to fraction form
    315,510.02/435,400.53 = 172,269.62/x
  3. Step 3: Cross multiply
    315,510.02x = 435,400.53 × 172,269.62
  4. Step 4: Simplify right side
    315,510.02x = 75,006,283,850.90
  5. Step 5: Solve for x
    x = 75,006,283,850.90/315,510.02
  6. Step 6: Final answer
    x = 237,730.28

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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.