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Finding the Fourth Proportional to 385,648.24, 578,384.88 and 136,330.24

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Solution

The fourth proportional to 385,648.24, 578,384.88 and 136,330.24 is: 204,464.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,648.24 : 578,384.88 = 136,330.24 : x
  2. Step 2: Convert to fraction form
    385,648.24/578,384.88 = 136,330.24/x
  3. Step 3: Cross multiply
    385,648.24x = 578,384.88 × 136,330.24
  4. Step 4: Simplify right side
    385,648.24x = 78,851,349,502.77
  5. Step 5: Solve for x
    x = 78,851,349,502.77/385,648.24
  6. Step 6: Final answer
    x = 204,464.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.