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Finding the Fourth Proportional to 385,646.24, 578,381.88 and 136,328.24

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Solution

The fourth proportional to 385,646.24, 578,381.88 and 136,328.24 is: 204,461.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,646.24 : 578,381.88 = 136,328.24 : x
  2. Step 2: Convert to fraction form
    385,646.24/578,381.88 = 136,328.24/x
  3. Step 3: Cross multiply
    385,646.24x = 578,381.88 × 136,328.24
  4. Step 4: Simplify right side
    385,646.24x = 78,849,783,748.29
  5. Step 5: Solve for x
    x = 78,849,783,748.29/385,646.24
  6. Step 6: Final answer
    x = 204,461.44

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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.