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Finding the Fourth Proportional to 875,640.80, 1,313,461.20 and 560,712.80

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Solution

The fourth proportional to 875,640.80, 1,313,461.20 and 560,712.80 is: 841,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,640.80 : 1,313,461.20 = 560,712.80 : x
  2. Step 2: Convert to fraction form
    875,640.80/1,313,461.20 = 560,712.80/x
  3. Step 3: Cross multiply
    875,640.80x = 1,313,461.20 × 560,712.80
  4. Step 4: Simplify right side
    875,640.80x = 736,474,507,143.36
  5. Step 5: Solve for x
    x = 736,474,507,143.36/875,640.80
  6. Step 6: Final answer
    x = 841,069.20

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Double scale
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Similar ratio
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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.