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Finding the Fourth Proportional to 553,928.16, 764,421.12 and 299,279.28

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Solution

The fourth proportional to 553,928.16, 764,421.12 and 299,279.28 is: 413,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,928.16 : 764,421.12 = 299,279.28 : x
  2. Step 2: Convert to fraction form
    553,928.16/764,421.12 = 299,279.28/x
  3. Step 3: Cross multiply
    553,928.16x = 764,421.12 × 299,279.28
  4. Step 4: Simplify right side
    553,928.16x = 228,775,402,410.39
  5. Step 5: Solve for x
    x = 228,775,402,410.39/553,928.16
  6. Step 6: Final answer
    x = 413,005.55

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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.