Home / 821,005,569.40-1,229,791,413.30-384,678,657.40

Finding the Fourth Proportional to 821,005,569.40, 1,229,791,413.30 and 384,678,657.40

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Solution

The fourth proportional to 821,005,569.40, 1,229,791,413.30 and 384,678,657.40 is: 576,213,520.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,005,569.40 : 1,229,791,413.30 = 384,678,657.40 : x
  2. Step 2: Convert to fraction form
    821,005,569.40/1,229,791,413.30 = 384,678,657.40/x
  3. Step 3: Cross multiply
    821,005,569.40x = 1,229,791,413.30 × 384,678,657.40
  4. Step 4: Simplify right side
    821,005,569.40x = 473,074,509,750,292,480
  5. Step 5: Solve for x
    x = 473,074,509,750,292,480/821,005,569.40
  6. Step 6: Final answer
    x = 576,213,520.81

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1.5x scale

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.