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Finding the Fourth Proportional to 865,706.86, 1,298,699.86 and 266,667.45

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Solution

The fourth proportional to 865,706.86, 1,298,699.86 and 266,667.45 is: 400,044.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,706.86 : 1,298,699.86 = 266,667.45 : x
  2. Step 2: Convert to fraction form
    865,706.86/1,298,699.86 = 266,667.45/x
  3. Step 3: Cross multiply
    865,706.86x = 1,298,699.86 × 266,667.45
  4. Step 4: Simplify right side
    865,706.86x = 346,320,979,981.56
  5. Step 5: Solve for x
    x = 346,320,979,981.56/865,706.86
  6. Step 6: Final answer
    x = 400,044.17

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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.