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Finding the Fourth Proportional to 438,492.39, 655,838.19 and 258,148.05

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Solution

The fourth proportional to 438,492.39, 655,838.19 and 258,148.05 is: 386,103.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,492.39 : 655,838.19 = 258,148.05 : x
  2. Step 2: Convert to fraction form
    438,492.39/655,838.19 = 258,148.05/x
  3. Step 3: Cross multiply
    438,492.39x = 655,838.19 × 258,148.05
  4. Step 4: Simplify right side
    438,492.39x = 169,303,349,864.03
  5. Step 5: Solve for x
    x = 169,303,349,864.03/438,492.39
  6. Step 6: Final answer
    x = 386,103.28

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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.