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Finding the Fourth Proportional to 518,154.04, 715,041.80 and 288,710.40

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Solution

The fourth proportional to 518,154.04, 715,041.80 and 288,710.40 is: 398,414.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,154.04 : 715,041.80 = 288,710.40 : x
  2. Step 2: Convert to fraction form
    518,154.04/715,041.80 = 288,710.40/x
  3. Step 3: Cross multiply
    518,154.04x = 715,041.80 × 288,710.40
  4. Step 4: Simplify right side
    518,154.04x = 206,440,004,094.72
  5. Step 5: Solve for x
    x = 206,440,004,094.72/518,154.04
  6. Step 6: Final answer
    x = 398,414.35

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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.