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Finding the Fourth Proportional to 610,440.90, 915,661.35 and 400,200.90

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Solution

The fourth proportional to 610,440.90, 915,661.35 and 400,200.90 is: 600,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,440.90 : 915,661.35 = 400,200.90 : x
  2. Step 2: Convert to fraction form
    610,440.90/915,661.35 = 400,200.90/x
  3. Step 3: Cross multiply
    610,440.90x = 915,661.35 × 400,200.90
  4. Step 4: Simplify right side
    610,440.90x = 366,448,496,365.22
  5. Step 5: Solve for x
    x = 366,448,496,365.22/610,440.90
  6. Step 6: Final answer
    x = 600,301.35

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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.