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Finding the Fourth Proportional to 651,647.80, 977,471.70 and 440,140.60

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Solution

The fourth proportional to 651,647.80, 977,471.70 and 440,140.60 is: 660,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,647.80 : 977,471.70 = 440,140.60 : x
  2. Step 2: Convert to fraction form
    651,647.80/977,471.70 = 440,140.60/x
  3. Step 3: Cross multiply
    651,647.80x = 977,471.70 × 440,140.60
  4. Step 4: Simplify right side
    651,647.80x = 430,224,980,521.02
  5. Step 5: Solve for x
    x = 430,224,980,521.02/651,647.80
  6. Step 6: Final answer
    x = 660,210.90

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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.