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Finding the Fourth Proportional to 280,345.60, 420,518.40 and 83,353.60

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Solution

The fourth proportional to 280,345.60, 420,518.40 and 83,353.60 is: 125,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,345.60 : 420,518.40 = 83,353.60 : x
  2. Step 2: Convert to fraction form
    280,345.60/420,518.40 = 83,353.60/x
  3. Step 3: Cross multiply
    280,345.60x = 420,518.40 × 83,353.60
  4. Step 4: Simplify right side
    280,345.60x = 35,051,722,506.24
  5. Step 5: Solve for x
    x = 35,051,722,506.24/280,345.60
  6. Step 6: Final answer
    x = 125,030.40

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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.