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Finding the Fourth Proportional to 520,390.88, 718,099.76 and 316,413.46

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Solution

The fourth proportional to 520,390.88, 718,099.76 and 316,413.46 is: 436,626.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,390.88 : 718,099.76 = 316,413.46 : x
  2. Step 2: Convert to fraction form
    520,390.88/718,099.76 = 316,413.46/x
  3. Step 3: Cross multiply
    520,390.88x = 718,099.76 × 316,413.46
  4. Step 4: Simplify right side
    520,390.88x = 227,216,429,686.77
  5. Step 5: Solve for x
    x = 227,216,429,686.77/520,390.88
  6. Step 6: Final answer
    x = 436,626.46

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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.