Home / 287,712,847.40-431,569,271.10-261,353,373.80

Finding the Fourth Proportional to 287,712,847.40, 431,569,271.10 and 261,353,373.80

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Solution

The fourth proportional to 287,712,847.40, 431,569,271.10 and 261,353,373.80 is: 392,030,060.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,847.40 : 431,569,271.10 = 261,353,373.80 : x
  2. Step 2: Convert to fraction form
    287,712,847.40/431,569,271.10 = 261,353,373.80/x
  3. Step 3: Cross multiply
    287,712,847.40x = 431,569,271.10 × 261,353,373.80
  4. Step 4: Simplify right side
    287,712,847.40x = 112,792,085,030,391,856
  5. Step 5: Solve for x
    x = 112,792,085,030,391,856/287,712,847.40
  6. Step 6: Final answer
    x = 392,030,060.70

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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.