Home / 287,812.72-397,178.38-158,756.63

Finding the Fourth Proportional to 287,812.72, 397,178.38 and 158,756.63

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Solution

The fourth proportional to 287,812.72, 397,178.38 and 158,756.63 is: 219,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,812.72 : 397,178.38 = 158,756.63 : x
  2. Step 2: Convert to fraction form
    287,812.72/397,178.38 = 158,756.63/x
  3. Step 3: Cross multiply
    287,812.72x = 397,178.38 × 158,756.63
  4. Step 4: Simplify right side
    287,812.72x = 63,054,700,720.77
  5. Step 5: Solve for x
    x = 63,054,700,720.77/287,812.72
  6. Step 6: Final answer
    x = 219,082.40

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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.