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Finding the Fourth Proportional to 709,576.80, 1,064,656.80 and 260,512.80

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Solution

The fourth proportional to 709,576.80, 1,064,656.80 and 260,512.80 is: 390,876.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,576.80 : 1,064,656.80 = 260,512.80 : x
  2. Step 2: Convert to fraction form
    709,576.80/1,064,656.80 = 260,512.80/x
  3. Step 3: Cross multiply
    709,576.80x = 1,064,656.80 × 260,512.80
  4. Step 4: Simplify right side
    709,576.80x = 277,356,724,007.04
  5. Step 5: Solve for x
    x = 277,356,724,007.04/709,576.80
  6. Step 6: Final answer
    x = 390,876.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.