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Finding the Fourth Proportional to 391,492.55, 540,234.14 and 230,316.45

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Solution

The fourth proportional to 391,492.55, 540,234.14 and 230,316.45 is: 317,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,492.55 : 540,234.14 = 230,316.45 : x
  2. Step 2: Convert to fraction form
    391,492.55/540,234.14 = 230,316.45/x
  3. Step 3: Cross multiply
    391,492.55x = 540,234.14 × 230,316.45
  4. Step 4: Simplify right side
    391,492.55x = 124,424,808,142.02
  5. Step 5: Solve for x
    x = 124,424,808,142.02/391,492.55
  6. Step 6: Final answer
    x = 317,821.65

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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.