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Finding the Fourth Proportional to 518,363.20, 715,254.55 and 288,870.20

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Solution

The fourth proportional to 518,363.20, 715,254.55 and 288,870.20 is: 398,592.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,363.20 : 715,254.55 = 288,870.20 : x
  2. Step 2: Convert to fraction form
    518,363.20/715,254.55 = 288,870.20/x
  3. Step 3: Cross multiply
    518,363.20x = 715,254.55 × 288,870.20
  4. Step 4: Simplify right side
    518,363.20x = 206,615,724,918.06
  5. Step 5: Solve for x
    x = 206,615,724,918.06/518,363.20
  6. Step 6: Final answer
    x = 398,592.58

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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.