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Finding the Fourth Proportional to 489,439, 734,070.70 and 129,612.12

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Solution

The fourth proportional to 489,439, 734,070.70 and 129,612.12 is: 194,394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,439 : 734,070.70 = 129,612.12 : x
  2. Step 2: Convert to fraction form
    489,439/734,070.70 = 129,612.12/x
  3. Step 3: Cross multiply
    489,439x = 734,070.70 × 129,612.12
  4. Step 4: Simplify right side
    489,439x = 95,144,459,656.88
  5. Step 5: Solve for x
    x = 95,144,459,656.88/489,439
  6. Step 6: Final answer
    x = 194,394.93

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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.