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Finding the Fourth Proportional to 717,280.92, 989,868.06 and 395,013.78

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Solution

The fourth proportional to 717,280.92, 989,868.06 and 395,013.78 is: 545,130.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,280.92 : 989,868.06 = 395,013.78 : x
  2. Step 2: Convert to fraction form
    717,280.92/989,868.06 = 395,013.78/x
  3. Step 3: Cross multiply
    717,280.92x = 989,868.06 × 395,013.78
  4. Step 4: Simplify right side
    717,280.92x = 391,011,524,081.87
  5. Step 5: Solve for x
    x = 391,011,524,081.87/717,280.92
  6. Step 6: Final answer
    x = 545,130.25

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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.