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Finding the Fourth Proportional to 555,718.20, 780,105 and 555,718.20

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Solution

The fourth proportional to 555,718.20, 780,105 and 555,718.20 is: 780,105

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,718.20 : 780,105 = 555,718.20 : x
  2. Step 2: Convert to fraction form
    555,718.20/780,105 = 555,718.20/x
  3. Step 3: Cross multiply
    555,718.20x = 780,105 × 555,718.20
  4. Step 4: Simplify right side
    555,718.20x = 433,518,546,411.00
  5. Step 5: Solve for x
    x = 433,518,546,411.00/555,718.20
  6. Step 6: Final answer
    x = 780,105

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.