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Finding the Fourth Proportional to 282,389.40, 389,671.98 and 155,062.20

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Solution

The fourth proportional to 282,389.40, 389,671.98 and 155,062.20 is: 213,971.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,389.40 : 389,671.98 = 155,062.20 : x
  2. Step 2: Convert to fraction form
    282,389.40/389,671.98 = 155,062.20/x
  3. Step 3: Cross multiply
    282,389.40x = 389,671.98 × 155,062.20
  4. Step 4: Simplify right side
    282,389.40x = 60,423,394,497.16
  5. Step 5: Solve for x
    x = 60,423,394,497.16/282,389.40
  6. Step 6: Final answer
    x = 213,971.89

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1.5x scale

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.