Home / 716,839.18-989,238.02-390,154.54

Finding the Fourth Proportional to 716,839.18, 989,238.02 and 390,154.54

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Solution

The fourth proportional to 716,839.18, 989,238.02 and 390,154.54 is: 538,413.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,839.18 : 989,238.02 = 390,154.54 : x
  2. Step 2: Convert to fraction form
    716,839.18/989,238.02 = 390,154.54/x
  3. Step 3: Cross multiply
    716,839.18x = 989,238.02 × 390,154.54
  4. Step 4: Simplify right side
    716,839.18x = 385,955,704,643.61
  5. Step 5: Solve for x
    x = 385,955,704,643.61/716,839.18
  6. Step 6: Final answer
    x = 538,413.24

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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.