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Finding the Fourth Proportional to 280,607.95, 387,247.28 and 153,285.63

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Solution

The fourth proportional to 280,607.95, 387,247.28 and 153,285.63 is: 211,538.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,607.95 : 387,247.28 = 153,285.63 : x
  2. Step 2: Convert to fraction form
    280,607.95/387,247.28 = 153,285.63/x
  3. Step 3: Cross multiply
    280,607.95x = 387,247.28 × 153,285.63
  4. Step 4: Simplify right side
    280,607.95x = 59,359,443,280.59
  5. Step 5: Solve for x
    x = 59,359,443,280.59/280,607.95
  6. Step 6: Final answer
    x = 211,538.71

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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.