Home / 638,117.10-957,110.85-217,386.90

Finding the Fourth Proportional to 638,117.10, 957,110.85 and 217,386.90

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Solution

The fourth proportional to 638,117.10, 957,110.85 and 217,386.90 is: 326,058.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,117.10 : 957,110.85 = 217,386.90 : x
  2. Step 2: Convert to fraction form
    638,117.10/957,110.85 = 217,386.90/x
  3. Step 3: Cross multiply
    638,117.10x = 957,110.85 × 217,386.90
  4. Step 4: Simplify right side
    638,117.10x = 208,063,360,637.87
  5. Step 5: Solve for x
    x = 208,063,360,637.87/638,117.10
  6. Step 6: Final answer
    x = 326,058.27

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Half scale
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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.