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Finding the Fourth Proportional to 917,295.40, 1,375,943.10 and 243,375.40

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Solution

The fourth proportional to 917,295.40, 1,375,943.10 and 243,375.40 is: 365,063.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,295.40 : 1,375,943.10 = 243,375.40 : x
  2. Step 2: Convert to fraction form
    917,295.40/1,375,943.10 = 243,375.40/x
  3. Step 3: Cross multiply
    917,295.40x = 1,375,943.10 × 243,375.40
  4. Step 4: Simplify right side
    917,295.40x = 334,870,702,339.74
  5. Step 5: Solve for x
    x = 334,870,702,339.74/917,295.40
  6. Step 6: Final answer
    x = 365,063.10

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Double scale
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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.