Home / 280,631.16-387,271.26-153,308.88

Finding the Fourth Proportional to 280,631.16, 387,271.26 and 153,308.88

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Solution

The fourth proportional to 280,631.16, 387,271.26 and 153,308.88 is: 211,566.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,631.16 : 387,271.26 = 153,308.88 : x
  2. Step 2: Convert to fraction form
    280,631.16/387,271.26 = 153,308.88/x
  3. Step 3: Cross multiply
    280,631.16x = 387,271.26 × 153,308.88
  4. Step 4: Simplify right side
    280,631.16x = 59,372,123,126.79
  5. Step 5: Solve for x
    x = 59,372,123,126.79/280,631.16
  6. Step 6: Final answer
    x = 211,566.40

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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.