Home / 718,603,669.20-991,678,994.64-396,742,004.40

Finding the Fourth Proportional to 718,603,669.20, 991,678,994.64 and 396,742,004.40

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Solution

The fourth proportional to 718,603,669.20, 991,678,994.64 and 396,742,004.40 is: 547,507,240.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,603,669.20 : 991,678,994.64 = 396,742,004.40 : x
  2. Step 2: Convert to fraction form
    718,603,669.20/991,678,994.64 = 396,742,004.40/x
  3. Step 3: Cross multiply
    718,603,669.20x = 991,678,994.64 × 396,742,004.40
  4. Step 4: Simplify right side
    718,603,669.20x = 393,440,712,054,850,432
  5. Step 5: Solve for x
    x = 393,440,712,054,850,432/718,603,669.20
  6. Step 6: Final answer
    x = 547,507,240.66

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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.