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Finding the Fourth Proportional to 280,368.80, 420,650.40 and 122,710.40

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Solution

The fourth proportional to 280,368.80, 420,650.40 and 122,710.40 is: 184,108.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,368.80 : 420,650.40 = 122,710.40 : x
  2. Step 2: Convert to fraction form
    280,368.80/420,650.40 = 122,710.40/x
  3. Step 3: Cross multiply
    280,368.80x = 420,650.40 × 122,710.40
  4. Step 4: Simplify right side
    280,368.80x = 51,618,178,844.16
  5. Step 5: Solve for x
    x = 51,618,178,844.16/280,368.80
  6. Step 6: Final answer
    x = 184,108.14

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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.