Home / 279,478.20-385,686.85-152,160.78

Finding the Fourth Proportional to 279,478.20, 385,686.85 and 152,160.78

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Solution

The fourth proportional to 279,478.20, 385,686.85 and 152,160.78 is: 209,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,478.20 : 385,686.85 = 152,160.78 : x
  2. Step 2: Convert to fraction form
    279,478.20/385,686.85 = 152,160.78/x
  3. Step 3: Cross multiply
    279,478.20x = 385,686.85 × 152,160.78
  4. Step 4: Simplify right side
    279,478.20x = 58,686,411,931.74
  5. Step 5: Solve for x
    x = 58,686,411,931.74/279,478.20
  6. Step 6: Final answer
    x = 209,985.65

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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.