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Finding the Fourth Proportional to 679,957,315.70, 1,019,935,973.55 and 220,225,421.30

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Solution

The fourth proportional to 679,957,315.70, 1,019,935,973.55 and 220,225,421.30 is: 330,338,131.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,957,315.70 : 1,019,935,973.55 = 220,225,421.30 : x
  2. Step 2: Convert to fraction form
    679,957,315.70/1,019,935,973.55 = 220,225,421.30/x
  3. Step 3: Cross multiply
    679,957,315.70x = 1,019,935,973.55 × 220,225,421.30
  4. Step 4: Simplify right side
    679,957,315.70x = 224,615,829,474,074,400
  5. Step 5: Solve for x
    x = 224,615,829,474,074,400/679,957,315.70
  6. Step 6: Final answer
    x = 330,338,131.95

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.