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Finding the Fourth Proportional to 566,138.90, 781,283.58 and 311,490.56

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Solution

The fourth proportional to 566,138.90, 781,283.58 and 311,490.56 is: 429,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,138.90 : 781,283.58 = 311,490.56 : x
  2. Step 2: Convert to fraction form
    566,138.90/781,283.58 = 311,490.56/x
  3. Step 3: Cross multiply
    566,138.90x = 781,283.58 × 311,490.56
  4. Step 4: Simplify right side
    566,138.90x = 243,362,459,853.01
  5. Step 5: Solve for x
    x = 243,362,459,853.01/566,138.90
  6. Step 6: Final answer
    x = 429,863.52

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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.