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Finding the Fourth Proportional to 970,099.80, 1,338,768.07 and 556,712.20

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Solution

The fourth proportional to 970,099.80, 1,338,768.07 and 556,712.20 is: 768,280.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,099.80 : 1,338,768.07 = 556,712.20 : x
  2. Step 2: Convert to fraction form
    970,099.80/1,338,768.07 = 556,712.20/x
  3. Step 3: Cross multiply
    970,099.80x = 1,338,768.07 × 556,712.20
  4. Step 4: Simplify right side
    970,099.80x = 745,308,517,539.45
  5. Step 5: Solve for x
    x = 745,308,517,539.45/970,099.80
  6. Step 6: Final answer
    x = 768,280.25

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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.