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Finding the Fourth Proportional to 516,423.55, 712,645.54 and 286,995.10

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Solution

The fourth proportional to 516,423.55, 712,645.54 and 286,995.10 is: 396,042.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,423.55 : 712,645.54 = 286,995.10 : x
  2. Step 2: Convert to fraction form
    516,423.55/712,645.54 = 286,995.10/x
  3. Step 3: Cross multiply
    516,423.55x = 712,645.54 × 286,995.10
  4. Step 4: Simplify right side
    516,423.55x = 204,525,778,016.85
  5. Step 5: Solve for x
    x = 204,525,778,016.85/516,423.55
  6. Step 6: Final answer
    x = 396,042.70

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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.