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Finding the Fourth Proportional to 421,685.97, 581,916.65 and 230,700.93

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Solution

The fourth proportional to 421,685.97, 581,916.65 and 230,700.93 is: 318,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,685.97 : 581,916.65 = 230,700.93 : x
  2. Step 2: Convert to fraction form
    421,685.97/581,916.65 = 230,700.93/x
  3. Step 3: Cross multiply
    421,685.97x = 581,916.65 × 230,700.93
  4. Step 4: Simplify right side
    421,685.97x = 134,248,712,337.49
  5. Step 5: Solve for x
    x = 134,248,712,337.49/421,685.97
  6. Step 6: Final answer
    x = 318,361.82

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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.