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Finding the Fourth Proportional to 720,069, 993,695.22 and 402,117

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Solution

The fourth proportional to 720,069, 993,695.22 and 402,117 is: 554,921.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,069 : 993,695.22 = 402,117 : x
  2. Step 2: Convert to fraction form
    720,069/993,695.22 = 402,117/x
  3. Step 3: Cross multiply
    720,069x = 993,695.22 × 402,117
  4. Step 4: Simplify right side
    720,069x = 399,581,740,780.74
  5. Step 5: Solve for x
    x = 399,581,740,780.74/720,069
  6. Step 6: Final answer
    x = 554,921.46

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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.