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Finding the Fourth Proportional to 518,554.20, 715,935.06 and 423,287.40

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Solution

The fourth proportional to 518,554.20, 715,935.06 and 423,287.40 is: 584,406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,554.20 : 715,935.06 = 423,287.40 : x
  2. Step 2: Convert to fraction form
    518,554.20/715,935.06 = 423,287.40/x
  3. Step 3: Cross multiply
    518,554.20x = 715,935.06 × 423,287.40
  4. Step 4: Simplify right side
    518,554.20x = 303,046,290,116.24
  5. Step 5: Solve for x
    x = 303,046,290,116.24/518,554.20
  6. Step 6: Final answer
    x = 584,406.20

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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.