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Finding the Fourth Proportional to 283,134.51, 390,725.69 and 155,810.11

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Solution

The fourth proportional to 283,134.51, 390,725.69 and 155,810.11 is: 215,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,134.51 : 390,725.69 = 155,810.11 : x
  2. Step 2: Convert to fraction form
    283,134.51/390,725.69 = 155,810.11/x
  3. Step 3: Cross multiply
    283,134.51x = 390,725.69 × 155,810.11
  4. Step 4: Simplify right side
    283,134.51x = 60,879,012,151.44
  5. Step 5: Solve for x
    x = 60,879,012,151.44/283,134.51
  6. Step 6: Final answer
    x = 215,017.98

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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.