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Finding the Fourth Proportional to 709,840.72, 979,603.38 and 387,575.34

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Solution

The fourth proportional to 709,840.72, 979,603.38 and 387,575.34 is: 534,866.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,840.72 : 979,603.38 = 387,575.34 : x
  2. Step 2: Convert to fraction form
    709,840.72/979,603.38 = 387,575.34/x
  3. Step 3: Cross multiply
    709,840.72x = 979,603.38 × 387,575.34
  4. Step 4: Simplify right side
    709,840.72x = 379,670,113,068.65
  5. Step 5: Solve for x
    x = 379,670,113,068.65/709,840.72
  6. Step 6: Final answer
    x = 534,866.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.