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Finding the Fourth Proportional to 282,347.10, 389,639.66 and 155,030.90

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Solution

The fourth proportional to 282,347.10, 389,639.66 and 155,030.90 is: 213,943.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,347.10 : 389,639.66 = 155,030.90 : x
  2. Step 2: Convert to fraction form
    282,347.10/389,639.66 = 155,030.90/x
  3. Step 3: Cross multiply
    282,347.10x = 389,639.66 × 155,030.90
  4. Step 4: Simplify right side
    282,347.10x = 60,406,187,165.49
  5. Step 5: Solve for x
    x = 60,406,187,165.49/282,347.10
  6. Step 6: Final answer
    x = 213,943.01

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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.