Home / 283,215.71-390,837.79-155,890.39

Finding the Fourth Proportional to 283,215.71, 390,837.79 and 155,890.39

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Solution

The fourth proportional to 283,215.71, 390,837.79 and 155,890.39 is: 215,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,215.71 : 390,837.79 = 155,890.39 : x
  2. Step 2: Convert to fraction form
    283,215.71/390,837.79 = 155,890.39/x
  3. Step 3: Cross multiply
    283,215.71x = 390,837.79 × 155,890.39
  4. Step 4: Simplify right side
    283,215.71x = 60,927,855,509.84
  5. Step 5: Solve for x
    x = 60,927,855,509.84/283,215.71
  6. Step 6: Final answer
    x = 215,128.80

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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.