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Finding the Fourth Proportional to 563,678.76, 777,876.30 and 309,034.20

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Solution

The fourth proportional to 563,678.76, 777,876.30 and 309,034.20 is: 426,466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,678.76 : 777,876.30 = 309,034.20 : x
  2. Step 2: Convert to fraction form
    563,678.76/777,876.30 = 309,034.20/x
  3. Step 3: Cross multiply
    563,678.76x = 777,876.30 × 309,034.20
  4. Step 4: Simplify right side
    563,678.76x = 240,390,380,069.46
  5. Step 5: Solve for x
    x = 240,390,380,069.46/563,678.76
  6. Step 6: Final answer
    x = 426,466.98

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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.