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Finding the Fourth Proportional to 518,820.77, 715,973.63 and 289,392.90

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Solution

The fourth proportional to 518,820.77, 715,973.63 and 289,392.90 is: 399,362.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,820.77 : 715,973.63 = 289,392.90 : x
  2. Step 2: Convert to fraction form
    518,820.77/715,973.63 = 289,392.90/x
  3. Step 3: Cross multiply
    518,820.77x = 715,973.63 × 289,392.90
  4. Step 4: Simplify right side
    518,820.77x = 207,197,686,632.55
  5. Step 5: Solve for x
    x = 207,197,686,632.55/518,820.77
  6. Step 6: Final answer
    x = 399,362.74

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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.