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Finding the Fourth Proportional to 615,012.16, 920,856.80 and 318,902.08

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Solution

The fourth proportional to 615,012.16, 920,856.80 and 318,902.08 is: 477,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,012.16 : 920,856.80 = 318,902.08 : x
  2. Step 2: Convert to fraction form
    615,012.16/920,856.80 = 318,902.08/x
  3. Step 3: Cross multiply
    615,012.16x = 920,856.80 × 318,902.08
  4. Step 4: Simplify right side
    615,012.16x = 293,663,148,902.14
  5. Step 5: Solve for x
    x = 293,663,148,902.14/615,012.16
  6. Step 6: Final answer
    x = 477,491.61

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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.