Home / 673,217,386.40-928,969,219.32-390,904,642.28

Finding the Fourth Proportional to 673,217,386.40, 928,969,219.32 and 390,904,642.28

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Solution

The fourth proportional to 673,217,386.40, 928,969,219.32 and 390,904,642.28 is: 539,407,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,217,386.40 : 928,969,219.32 = 390,904,642.28 : x
  2. Step 2: Convert to fraction form
    673,217,386.40/928,969,219.32 = 390,904,642.28/x
  3. Step 3: Cross multiply
    673,217,386.40x = 928,969,219.32 × 390,904,642.28
  4. Step 4: Simplify right side
    673,217,386.40x = 363,138,380,367,415,488
  5. Step 5: Solve for x
    x = 363,138,380,367,415,488/673,217,386.40
  6. Step 6: Final answer
    x = 539,407,311.37

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Double scale
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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.