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Finding the Fourth Proportional to 870,809.60, 1,306,137.60 and 239,667.20

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Solution

The fourth proportional to 870,809.60, 1,306,137.60 and 239,667.20 is: 359,479.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,809.60 : 1,306,137.60 = 239,667.20 : x
  2. Step 2: Convert to fraction form
    870,809.60/1,306,137.60 = 239,667.20/x
  3. Step 3: Cross multiply
    870,809.60x = 1,306,137.60 × 239,667.20
  4. Step 4: Simplify right side
    870,809.60x = 313,038,341,406.72
  5. Step 5: Solve for x
    x = 313,038,341,406.72/870,809.60
  6. Step 6: Final answer
    x = 359,479.66

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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.