Home / 928,143.36-1,280,916.18-520,238.70

Finding the Fourth Proportional to 928,143.36, 1,280,916.18 and 520,238.70

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Solution

The fourth proportional to 928,143.36, 1,280,916.18 and 520,238.70 is: 717,973.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,143.36 : 1,280,916.18 = 520,238.70 : x
  2. Step 2: Convert to fraction form
    928,143.36/1,280,916.18 = 520,238.70/x
  3. Step 3: Cross multiply
    928,143.36x = 1,280,916.18 × 520,238.70
  4. Step 4: Simplify right side
    928,143.36x = 666,382,168,292.17
  5. Step 5: Solve for x
    x = 666,382,168,292.17/928,143.36
  6. Step 6: Final answer
    x = 717,973.32

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Double scale
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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.