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Finding the Fourth Proportional to 391,063.95, 539,389.47 and 358,902.24

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Solution

The fourth proportional to 391,063.95, 539,389.47 and 358,902.24 is: 495,029.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,063.95 : 539,389.47 = 358,902.24 : x
  2. Step 2: Convert to fraction form
    391,063.95/539,389.47 = 358,902.24/x
  3. Step 3: Cross multiply
    391,063.95x = 539,389.47 × 358,902.24
  4. Step 4: Simplify right side
    391,063.95x = 193,588,089,015.41
  5. Step 5: Solve for x
    x = 193,588,089,015.41/391,063.95
  6. Step 6: Final answer
    x = 495,029.23

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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.