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Finding the Fourth Proportional to 1,145,165.70, 1,717,748.55 and 724,916.10

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Solution

The fourth proportional to 1,145,165.70, 1,717,748.55 and 724,916.10 is: 1,087,374.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145,165.70 : 1,717,748.55 = 724,916.10 : x
  2. Step 2: Convert to fraction form
    1,145,165.70/1,717,748.55 = 724,916.10/x
  3. Step 3: Cross multiply
    1,145,165.70x = 1,717,748.55 × 724,916.10
  4. Step 4: Simplify right side
    1,145,165.70x = 1,245,223,579,646.66
  5. Step 5: Solve for x
    x = 1,245,223,579,646.66/1,145,165.70
  6. Step 6: Final answer
    x = 1,087,374.15

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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.