Home / 283,128.72-390,707.84-155,792.40

Finding the Fourth Proportional to 283,128.72, 390,707.84 and 155,792.40

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Solution

The fourth proportional to 283,128.72, 390,707.84 and 155,792.40 is: 214,988.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,128.72 : 390,707.84 = 155,792.40 : x
  2. Step 2: Convert to fraction form
    283,128.72/390,707.84 = 155,792.40/x
  3. Step 3: Cross multiply
    283,128.72x = 390,707.84 × 155,792.40
  4. Step 4: Simplify right side
    283,128.72x = 60,869,312,092.42
  5. Step 5: Solve for x
    x = 60,869,312,092.42/283,128.72
  6. Step 6: Final answer
    x = 214,988.12

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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.