Home / 278,518.40-384,404.48-157,666.56

Finding the Fourth Proportional to 278,518.40, 384,404.48 and 157,666.56

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Solution

The fourth proportional to 278,518.40, 384,404.48 and 157,666.56 is: 217,607.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,518.40 : 384,404.48 = 157,666.56 : x
  2. Step 2: Convert to fraction form
    278,518.40/384,404.48 = 157,666.56/x
  3. Step 3: Cross multiply
    278,518.40x = 384,404.48 × 157,666.56
  4. Step 4: Simplify right side
    278,518.40x = 60,607,732,010.19
  5. Step 5: Solve for x
    x = 60,607,732,010.19/278,518.40
  6. Step 6: Final answer
    x = 217,607.64

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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.