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Finding the Fourth Proportional to 315,510.38, 435,864.93 and 272,995.10

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Solution

The fourth proportional to 315,510.38, 435,864.93 and 272,995.10 is: 377,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,510.38 : 435,864.93 = 272,995.10 : x
  2. Step 2: Convert to fraction form
    315,510.38/435,864.93 = 272,995.10/x
  3. Step 3: Cross multiply
    315,510.38x = 435,864.93 × 272,995.10
  4. Step 4: Simplify right side
    315,510.38x = 118,988,990,151.84
  5. Step 5: Solve for x
    x = 118,988,990,151.84/315,510.38
  6. Step 6: Final answer
    x = 377,131.78

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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.