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Finding the Fourth Proportional to 306,875.65, 423,373.80 and 306,402.57

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Solution

The fourth proportional to 306,875.65, 423,373.80 and 306,402.57 is: 422,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,875.65 : 423,373.80 = 306,402.57 : x
  2. Step 2: Convert to fraction form
    306,875.65/423,373.80 = 306,402.57/x
  3. Step 3: Cross multiply
    306,875.65x = 423,373.80 × 306,402.57
  4. Step 4: Simplify right side
    306,875.65x = 129,722,820,390.67
  5. Step 5: Solve for x
    x = 129,722,820,390.67/306,875.65
  6. Step 6: Final answer
    x = 422,721.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.