Home / 687,962,019.78-949,329,269.10-386,523,731.16

Finding the Fourth Proportional to 687,962,019.78, 949,329,269.10 and 386,523,731.16

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Solution

The fourth proportional to 687,962,019.78, 949,329,269.10 and 386,523,731.16 is: 533,369,983.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,962,019.78 : 949,329,269.10 = 386,523,731.16 : x
  2. Step 2: Convert to fraction form
    687,962,019.78/949,329,269.10 = 386,523,731.16/x
  3. Step 3: Cross multiply
    687,962,019.78x = 949,329,269.10 × 386,523,731.16
  4. Step 4: Simplify right side
    687,962,019.78x = 366,938,291,191,927,744
  5. Step 5: Solve for x
    x = 366,938,291,191,927,744/687,962,019.78
  6. Step 6: Final answer
    x = 533,369,983.58

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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.