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Finding the Fourth Proportional to 518,555.54, 715,352.28 and 346,515.74

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Solution

The fourth proportional to 518,555.54, 715,352.28 and 346,515.74 is: 478,021.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,555.54 : 715,352.28 = 346,515.74 : x
  2. Step 2: Convert to fraction form
    518,555.54/715,352.28 = 346,515.74/x
  3. Step 3: Cross multiply
    518,555.54x = 715,352.28 × 346,515.74
  4. Step 4: Simplify right side
    518,555.54x = 247,880,824,664.89
  5. Step 5: Solve for x
    x = 247,880,824,664.89/518,555.54
  6. Step 6: Final answer
    x = 478,021.75

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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.