Home / 712,759.74-983,567.10-390,413.71

Finding the Fourth Proportional to 712,759.74, 983,567.10 and 390,413.71

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Solution

The fourth proportional to 712,759.74, 983,567.10 and 390,413.71 is: 538,748.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,759.74 : 983,567.10 = 390,413.71 : x
  2. Step 2: Convert to fraction form
    712,759.74/983,567.10 = 390,413.71/x
  3. Step 3: Cross multiply
    712,759.74x = 983,567.10 × 390,413.71
  4. Step 4: Simplify right side
    712,759.74x = 383,998,080,544.94
  5. Step 5: Solve for x
    x = 383,998,080,544.94/712,759.74
  6. Step 6: Final answer
    x = 538,748.28

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Double scale
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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.