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Finding the Fourth Proportional to 455,701.20, 683,551.80 and 278,408.40

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Solution

The fourth proportional to 455,701.20, 683,551.80 and 278,408.40 is: 417,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,701.20 : 683,551.80 = 278,408.40 : x
  2. Step 2: Convert to fraction form
    455,701.20/683,551.80 = 278,408.40/x
  3. Step 3: Cross multiply
    455,701.20x = 683,551.80 × 278,408.40
  4. Step 4: Simplify right side
    455,701.20x = 190,306,562,955.12
  5. Step 5: Solve for x
    x = 190,306,562,955.12/455,701.20
  6. Step 6: Final answer
    x = 417,612.60

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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.