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Finding the Fourth Proportional to 709,710.05, 979,362.45 and 387,357.59

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Solution

The fourth proportional to 709,710.05, 979,362.45 and 387,357.59 is: 534,533.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,710.05 : 979,362.45 = 387,357.59 : x
  2. Step 2: Convert to fraction form
    709,710.05/979,362.45 = 387,357.59/x
  3. Step 3: Cross multiply
    709,710.05x = 979,362.45 × 387,357.59
  4. Step 4: Simplify right side
    709,710.05x = 379,363,473,471.68
  5. Step 5: Solve for x
    x = 379,363,473,471.68/709,710.05
  6. Step 6: Final answer
    x = 534,533.05

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Double scale
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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.