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Finding the Fourth Proportional to 917,376.40, 1,376,064.60 and 858,327.40

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Solution

The fourth proportional to 917,376.40, 1,376,064.60 and 858,327.40 is: 1,287,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,376.40 : 1,376,064.60 = 858,327.40 : x
  2. Step 2: Convert to fraction form
    917,376.40/1,376,064.60 = 858,327.40/x
  3. Step 3: Cross multiply
    917,376.40x = 1,376,064.60 × 858,327.40
  4. Step 4: Simplify right side
    917,376.40x = 1,181,113,950,350.04
  5. Step 5: Solve for x
    x = 1,181,113,950,350.04/917,376.40
  6. Step 6: Final answer
    x = 1,287,491.10

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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.