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Finding the Fourth Proportional to 377,358, 520,328.88 and 291,120.72

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Solution

The fourth proportional to 377,358, 520,328.88 and 291,120.72 is: 401,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,358 : 520,328.88 = 291,120.72 : x
  2. Step 2: Convert to fraction form
    377,358/520,328.88 = 291,120.72/x
  3. Step 3: Cross multiply
    377,358x = 520,328.88 × 291,120.72
  4. Step 4: Simplify right side
    377,358x = 151,478,518,182.39
  5. Step 5: Solve for x
    x = 151,478,518,182.39/377,358
  6. Step 6: Final answer
    x = 401,418.60

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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.