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Finding the Fourth Proportional to 875,871.72, 1,208,703.78 and 513,223.38

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Solution

The fourth proportional to 875,871.72, 1,208,703.78 and 513,223.38 is: 708,248.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,871.72 : 1,208,703.78 = 513,223.38 : x
  2. Step 2: Convert to fraction form
    875,871.72/1,208,703.78 = 513,223.38/x
  3. Step 3: Cross multiply
    875,871.72x = 1,208,703.78 × 513,223.38
  4. Step 4: Simplify right side
    875,871.72x = 620,335,039,390.38
  5. Step 5: Solve for x
    x = 620,335,039,390.38/875,871.72
  6. Step 6: Final answer
    x = 708,248.74

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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.