Home / 648,130.20-970,640.10-315,317.40

Finding the Fourth Proportional to 648,130.20, 970,640.10 and 315,317.40

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Solution

The fourth proportional to 648,130.20, 970,640.10 and 315,317.40 is: 472,219.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,130.20 : 970,640.10 = 315,317.40 : x
  2. Step 2: Convert to fraction form
    648,130.20/970,640.10 = 315,317.40/x
  3. Step 3: Cross multiply
    648,130.20x = 970,640.10 × 315,317.40
  4. Step 4: Simplify right side
    648,130.20x = 306,059,712,667.74
  5. Step 5: Solve for x
    x = 306,059,712,667.74/648,130.20
  6. Step 6: Final answer
    x = 472,219.49

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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.