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Finding the Fourth Proportional to 555,724.80, 766,843.20 and 313,988.40

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Solution

The fourth proportional to 555,724.80, 766,843.20 and 313,988.40 is: 433,271.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,724.80 : 766,843.20 = 313,988.40 : x
  2. Step 2: Convert to fraction form
    555,724.80/766,843.20 = 313,988.40/x
  3. Step 3: Cross multiply
    555,724.80x = 766,843.20 × 313,988.40
  4. Step 4: Simplify right side
    555,724.80x = 240,779,869,418.88
  5. Step 5: Solve for x
    x = 240,779,869,418.88/555,724.80
  6. Step 6: Final answer
    x = 433,271.77

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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.