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Finding the Fourth Proportional to 1,243,511.70, 1,865,267.55 and 865,598.10

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Solution

The fourth proportional to 1,243,511.70, 1,865,267.55 and 865,598.10 is: 1,298,397.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,511.70 : 1,865,267.55 = 865,598.10 : x
  2. Step 2: Convert to fraction form
    1,243,511.70/1,865,267.55 = 865,598.10/x
  3. Step 3: Cross multiply
    1,243,511.70x = 1,865,267.55 × 865,598.10
  4. Step 4: Simplify right side
    1,243,511.70x = 1,614,572,047,271.66
  5. Step 5: Solve for x
    x = 1,614,572,047,271.66/1,243,511.70
  6. Step 6: Final answer
    x = 1,298,397.15

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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.