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Finding the Fourth Proportional to 426,522.95, 640,276.51 and 216,603.76

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Solution

The fourth proportional to 426,522.95, 640,276.51 and 216,603.76 is: 325,155.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,522.95 : 640,276.51 = 216,603.76 : x
  2. Step 2: Convert to fraction form
    426,522.95/640,276.51 = 216,603.76/x
  3. Step 3: Cross multiply
    426,522.95x = 640,276.51 × 216,603.76
  4. Step 4: Simplify right side
    426,522.95x = 138,686,299,505.68
  5. Step 5: Solve for x
    x = 138,686,299,505.68/426,522.95
  6. Step 6: Final answer
    x = 325,155.54

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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.