Home / 787,430.40-1,181,145.60-314,188.80

Finding the Fourth Proportional to 787,430.40, 1,181,145.60 and 314,188.80

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Solution

The fourth proportional to 787,430.40, 1,181,145.60 and 314,188.80 is: 471,283.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,430.40 : 1,181,145.60 = 314,188.80 : x
  2. Step 2: Convert to fraction form
    787,430.40/1,181,145.60 = 314,188.80/x
  3. Step 3: Cross multiply
    787,430.40x = 1,181,145.60 × 314,188.80
  4. Step 4: Simplify right side
    787,430.40x = 371,102,718,689.28
  5. Step 5: Solve for x
    x = 371,102,718,689.28/787,430.40
  6. Step 6: Final answer
    x = 471,283.20

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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.