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Finding the Fourth Proportional to 554,862.87, 765,713.39 and 313,155.63

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Solution

The fourth proportional to 554,862.87, 765,713.39 and 313,155.63 is: 432,156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,862.87 : 765,713.39 = 313,155.63 : x
  2. Step 2: Convert to fraction form
    554,862.87/765,713.39 = 313,155.63/x
  3. Step 3: Cross multiply
    554,862.87x = 765,713.39 × 313,155.63
  4. Step 4: Simplify right side
    554,862.87x = 239,787,457,479.11
  5. Step 5: Solve for x
    x = 239,787,457,479.11/554,862.87
  6. Step 6: Final answer
    x = 432,156.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.