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Finding the Fourth Proportional to 478,340.40, 716,128.20 and 291,716.40

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Solution

The fourth proportional to 478,340.40, 716,128.20 and 291,716.40 is: 436,731.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,340.40 : 716,128.20 = 291,716.40 : x
  2. Step 2: Convert to fraction form
    478,340.40/716,128.20 = 291,716.40/x
  3. Step 3: Cross multiply
    478,340.40x = 716,128.20 × 291,716.40
  4. Step 4: Simplify right side
    478,340.40x = 208,906,340,442.48
  5. Step 5: Solve for x
    x = 208,906,340,442.48/478,340.40
  6. Step 6: Final answer
    x = 436,731.54

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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.