Home / 391,523,389.48-540,316,143.30-215,325,022.60

Finding the Fourth Proportional to 391,523,389.48, 540,316,143.30 and 215,325,022.60

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Solution

The fourth proportional to 391,523,389.48, 540,316,143.30 and 215,325,022.60 is: 297,156,156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,523,389.48 : 540,316,143.30 = 215,325,022.60 : x
  2. Step 2: Convert to fraction form
    391,523,389.48/540,316,143.30 = 215,325,022.60/x
  3. Step 3: Cross multiply
    391,523,389.48x = 540,316,143.30 × 215,325,022.60
  4. Step 4: Simplify right side
    391,523,389.48x = 116,343,585,767,217,328
  5. Step 5: Solve for x
    x = 116,343,585,767,217,328/391,523,389.48
  6. Step 6: Final answer
    x = 297,156,156.93

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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.