Home / 648,868.86-895,515.11-390,876.05

Finding the Fourth Proportional to 648,868.86, 895,515.11 and 390,876.05

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Solution

The fourth proportional to 648,868.86, 895,515.11 and 390,876.05 is: 539,454.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,868.86 : 895,515.11 = 390,876.05 : x
  2. Step 2: Convert to fraction form
    648,868.86/895,515.11 = 390,876.05/x
  3. Step 3: Cross multiply
    648,868.86x = 895,515.11 × 390,876.05
  4. Step 4: Simplify right side
    648,868.86x = 350,035,402,480.16
  5. Step 5: Solve for x
    x = 350,035,402,480.16/648,868.86
  6. Step 6: Final answer
    x = 539,454.78

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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.