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Finding the Fourth Proportional to 426,278.40, 639,417.60 and 299,097.60

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Solution

The fourth proportional to 426,278.40, 639,417.60 and 299,097.60 is: 448,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,278.40 : 639,417.60 = 299,097.60 : x
  2. Step 2: Convert to fraction form
    426,278.40/639,417.60 = 299,097.60/x
  3. Step 3: Cross multiply
    426,278.40x = 639,417.60 × 299,097.60
  4. Step 4: Simplify right side
    426,278.40x = 191,248,269,557.76
  5. Step 5: Solve for x
    x = 191,248,269,557.76/426,278.40
  6. Step 6: Final answer
    x = 448,646.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.