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Finding the Fourth Proportional to 391,064.45, 539,390.16 and 358,902.74

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Solution

The fourth proportional to 391,064.45, 539,390.16 and 358,902.74 is: 495,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,064.45 : 539,390.16 = 358,902.74 : x
  2. Step 2: Convert to fraction form
    391,064.45/539,390.16 = 358,902.74/x
  3. Step 3: Cross multiply
    391,064.45x = 539,390.16 × 358,902.74
  4. Step 4: Simplify right side
    391,064.45x = 193,588,606,353.04
  5. Step 5: Solve for x
    x = 193,588,606,353.04/391,064.45
  6. Step 6: Final answer
    x = 495,029.92

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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.