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Finding the Fourth Proportional to 890,443.40, 1,335,665.10 and 779,851.40

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Solution

The fourth proportional to 890,443.40, 1,335,665.10 and 779,851.40 is: 1,169,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,443.40 : 1,335,665.10 = 779,851.40 : x
  2. Step 2: Convert to fraction form
    890,443.40/1,335,665.10 = 779,851.40/x
  3. Step 3: Cross multiply
    890,443.40x = 1,335,665.10 × 779,851.40
  4. Step 4: Simplify right side
    890,443.40x = 1,041,620,298,166.14
  5. Step 5: Solve for x
    x = 1,041,620,298,166.14/890,443.40
  6. Step 6: Final answer
    x = 1,169,777.10

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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.