Home / 720,221,748.60-993,902,109.72-402,681,933.56

Finding the Fourth Proportional to 720,221,748.60, 993,902,109.72 and 402,681,933.56

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Solution

The fourth proportional to 720,221,748.60, 993,902,109.72 and 402,681,933.56 is: 555,698,885.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,221,748.60 : 993,902,109.72 = 402,681,933.56 : x
  2. Step 2: Convert to fraction form
    720,221,748.60/993,902,109.72 = 402,681,933.56/x
  3. Step 3: Cross multiply
    720,221,748.60x = 993,902,109.72 × 402,681,933.56
  4. Step 4: Simplify right side
    720,221,748.60x = 400,226,423,311,412,864
  5. Step 5: Solve for x
    x = 400,226,423,311,412,864/720,221,748.60
  6. Step 6: Final answer
    x = 555,698,885.92

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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.