Home / 812,345.60-1,218,518.40-213,267.20

Finding the Fourth Proportional to 812,345.60, 1,218,518.40 and 213,267.20

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Solution

The fourth proportional to 812,345.60, 1,218,518.40 and 213,267.20 is: 319,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,345.60 : 1,218,518.40 = 213,267.20 : x
  2. Step 2: Convert to fraction form
    812,345.60/1,218,518.40 = 213,267.20/x
  3. Step 3: Cross multiply
    812,345.60x = 1,218,518.40 × 213,267.20
  4. Step 4: Simplify right side
    812,345.60x = 259,870,007,316.48
  5. Step 5: Solve for x
    x = 259,870,007,316.48/812,345.60
  6. Step 6: Final answer
    x = 319,900.80

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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.