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Finding the Fourth Proportional to 518,554.85, 777,832.28 and 429,981.35

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Solution

The fourth proportional to 518,554.85, 777,832.28 and 429,981.35 is: 644,972.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,554.85 : 777,832.28 = 429,981.35 : x
  2. Step 2: Convert to fraction form
    518,554.85/777,832.28 = 429,981.35/x
  3. Step 3: Cross multiply
    518,554.85x = 777,832.28 × 429,981.35
  4. Step 4: Simplify right side
    518,554.85x = 334,453,371,678.07
  5. Step 5: Solve for x
    x = 334,453,371,678.07/518,554.85
  6. Step 6: Final answer
    x = 644,972.03

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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.