Home / 643,862,061.60-889,119,930.32-408,988,395.04

Finding the Fourth Proportional to 643,862,061.60, 889,119,930.32 and 408,988,395.04

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Solution

The fourth proportional to 643,862,061.60, 889,119,930.32 and 408,988,395.04 is: 564,778,941.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,862,061.60 : 889,119,930.32 = 408,988,395.04 : x
  2. Step 2: Convert to fraction form
    643,862,061.60/889,119,930.32 = 408,988,395.04/x
  3. Step 3: Cross multiply
    643,862,061.60x = 889,119,930.32 × 408,988,395.04
  4. Step 4: Simplify right side
    643,862,061.60x = 363,639,733,299,653,504
  5. Step 5: Solve for x
    x = 363,639,733,299,653,504/643,862,061.60
  6. Step 6: Final answer
    x = 564,778,941.00

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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.