Home / 430,811.40-646,994.70-312,616.20

Finding the Fourth Proportional to 430,811.40, 646,994.70 and 312,616.20

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Solution

The fourth proportional to 430,811.40, 646,994.70 and 312,616.20 is: 469,488.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,811.40 : 646,994.70 = 312,616.20 : x
  2. Step 2: Convert to fraction form
    430,811.40/646,994.70 = 312,616.20/x
  3. Step 3: Cross multiply
    430,811.40x = 646,994.70 × 312,616.20
  4. Step 4: Simplify right side
    430,811.40x = 202,261,024,534.14
  5. Step 5: Solve for x
    x = 202,261,024,534.14/430,811.40
  6. Step 6: Final answer
    x = 469,488.56

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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.