Home / 912,375.40-1,368,854.70-313,720.60

Finding the Fourth Proportional to 912,375.40, 1,368,854.70 and 313,720.60

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Solution

The fourth proportional to 912,375.40, 1,368,854.70 and 313,720.60 is: 470,681.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,375.40 : 1,368,854.70 = 313,720.60 : x
  2. Step 2: Convert to fraction form
    912,375.40/1,368,854.70 = 313,720.60/x
  3. Step 3: Cross multiply
    912,375.40x = 1,368,854.70 × 313,720.60
  4. Step 4: Simplify right side
    912,375.40x = 429,437,917,796.82
  5. Step 5: Solve for x
    x = 429,437,917,796.82/912,375.40
  6. Step 6: Final answer
    x = 470,681.17

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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.