Home / 518,719.95-715,819.28-289,284.21

Finding the Fourth Proportional to 518,719.95, 715,819.28 and 289,284.21

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Solution

The fourth proportional to 518,719.95, 715,819.28 and 289,284.21 is: 399,204.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,719.95 : 715,819.28 = 289,284.21 : x
  2. Step 2: Convert to fraction form
    518,719.95/715,819.28 = 289,284.21/x
  3. Step 3: Cross multiply
    518,719.95x = 715,819.28 × 289,284.21
  4. Step 4: Simplify right side
    518,719.95x = 207,075,213,471.15
  5. Step 5: Solve for x
    x = 207,075,213,471.15/518,719.95
  6. Step 6: Final answer
    x = 399,204.26

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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.