Home / 287,712,856.40-431,569,284.60-261,353,382.80

Finding the Fourth Proportional to 287,712,856.40, 431,569,284.60 and 261,353,382.80

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Solution

The fourth proportional to 287,712,856.40, 431,569,284.60 and 261,353,382.80 is: 392,030,074.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,856.40 : 431,569,284.60 = 261,353,382.80 : x
  2. Step 2: Convert to fraction form
    287,712,856.40/431,569,284.60 = 261,353,382.80/x
  3. Step 3: Cross multiply
    287,712,856.40x = 431,569,284.60 × 261,353,382.80
  4. Step 4: Simplify right side
    287,712,856.40x = 112,792,092,442,785,952
  5. Step 5: Solve for x
    x = 112,792,092,442,785,952/287,712,856.40
  6. Step 6: Final answer
    x = 392,030,074.20

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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.