Home / 663,320.16-915,267.06-391,367.52

Finding the Fourth Proportional to 663,320.16, 915,267.06 and 391,367.52

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Solution

The fourth proportional to 663,320.16, 915,267.06 and 391,367.52 is: 540,019.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,320.16 : 915,267.06 = 391,367.52 : x
  2. Step 2: Convert to fraction form
    663,320.16/915,267.06 = 391,367.52/x
  3. Step 3: Cross multiply
    663,320.16x = 915,267.06 × 391,367.52
  4. Step 4: Simplify right side
    663,320.16x = 358,205,799,409.89
  5. Step 5: Solve for x
    x = 358,205,799,409.89/663,320.16
  6. Step 6: Final answer
    x = 540,019.47

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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.