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Finding the Fourth Proportional to 563,394.78, 777,490.92 and 308,740.50

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Solution

The fourth proportional to 563,394.78, 777,490.92 and 308,740.50 is: 426,065.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,394.78 : 777,490.92 = 308,740.50 : x
  2. Step 2: Convert to fraction form
    563,394.78/777,490.92 = 308,740.50/x
  3. Step 3: Cross multiply
    563,394.78x = 777,490.92 × 308,740.50
  4. Step 4: Simplify right side
    563,394.78x = 240,042,935,386.26
  5. Step 5: Solve for x
    x = 240,042,935,386.26/563,394.78
  6. Step 6: Final answer
    x = 426,065.25

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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.