Home / 425,712,009.60-638,568,014.40-421,680,931.20

Finding the Fourth Proportional to 425,712,009.60, 638,568,014.40 and 421,680,931.20

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Solution

The fourth proportional to 425,712,009.60, 638,568,014.40 and 421,680,931.20 is: 632,521,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,712,009.60 : 638,568,014.40 = 421,680,931.20 : x
  2. Step 2: Convert to fraction form
    425,712,009.60/638,568,014.40 = 421,680,931.20/x
  3. Step 3: Cross multiply
    425,712,009.60x = 638,568,014.40 × 421,680,931.20
  4. Step 4: Simplify right side
    425,712,009.60x = 269,271,954,946,726,976
  5. Step 5: Solve for x
    x = 269,271,954,946,726,976/425,712,009.60
  6. Step 6: Final answer
    x = 632,521,396.80

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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.