Home / 708,020.48-977,067.84-390,068.48

Finding the Fourth Proportional to 708,020.48, 977,067.84 and 390,068.48

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Solution

The fourth proportional to 708,020.48, 977,067.84 and 390,068.48 is: 538,294.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,020.48 : 977,067.84 = 390,068.48 : x
  2. Step 2: Convert to fraction form
    708,020.48/977,067.84 = 390,068.48/x
  3. Step 3: Cross multiply
    708,020.48x = 977,067.84 × 390,068.48
  4. Step 4: Simplify right side
    708,020.48x = 381,123,367,205.68
  5. Step 5: Solve for x
    x = 381,123,367,205.68/708,020.48
  6. Step 6: Final answer
    x = 538,294.27

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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.