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Finding the Fourth Proportional to 555,751.19, 766,513.46 and 478,358.55

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Solution

The fourth proportional to 555,751.19, 766,513.46 and 478,358.55 is: 659,770.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,751.19 : 766,513.46 = 478,358.55 : x
  2. Step 2: Convert to fraction form
    555,751.19/766,513.46 = 478,358.55/x
  3. Step 3: Cross multiply
    555,751.19x = 766,513.46 × 478,358.55
  4. Step 4: Simplify right side
    555,751.19x = 366,668,268,476.98
  5. Step 5: Solve for x
    x = 366,668,268,476.98/555,751.19
  6. Step 6: Final answer
    x = 659,770.55

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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.