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Finding the Fourth Proportional to 310,737.12, 428,552.64 and 262,574.40

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Solution

The fourth proportional to 310,737.12, 428,552.64 and 262,574.40 is: 362,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,737.12 : 428,552.64 = 262,574.40 : x
  2. Step 2: Convert to fraction form
    310,737.12/428,552.64 = 262,574.40/x
  3. Step 3: Cross multiply
    310,737.12x = 428,552.64 × 262,574.40
  4. Step 4: Simplify right side
    310,737.12x = 112,526,952,316.42
  5. Step 5: Solve for x
    x = 112,526,952,316.42/310,737.12
  6. Step 6: Final answer
    x = 362,129.10

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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.