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Finding the Fourth Proportional to 709,745.58, 979,465.68 and 387,458.10

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Solution

The fourth proportional to 709,745.58, 979,465.68 and 387,458.10 is: 534,701.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,745.58 : 979,465.68 = 387,458.10 : x
  2. Step 2: Convert to fraction form
    709,745.58/979,465.68 = 387,458.10/x
  3. Step 3: Cross multiply
    709,745.58x = 979,465.68 × 387,458.10
  4. Step 4: Simplify right side
    709,745.58x = 379,501,911,388.01
  5. Step 5: Solve for x
    x = 379,501,911,388.01/709,745.58
  6. Step 6: Final answer
    x = 534,701.34

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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.