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Finding the Fourth Proportional to 970,647.80, 1,455,626.10 and 438,423.80

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Solution

The fourth proportional to 970,647.80, 1,455,626.10 and 438,423.80 is: 657,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,647.80 : 1,455,626.10 = 438,423.80 : x
  2. Step 2: Convert to fraction form
    970,647.80/1,455,626.10 = 438,423.80/x
  3. Step 3: Cross multiply
    970,647.80x = 1,455,626.10 × 438,423.80
  4. Step 4: Simplify right side
    970,647.80x = 638,181,126,141.18
  5. Step 5: Solve for x
    x = 638,181,126,141.18/970,647.80
  6. Step 6: Final answer
    x = 657,479.60

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Double scale
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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.