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Finding the Fourth Proportional to 663,323.41, 915,271.54 and 391,370.77

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Solution

The fourth proportional to 663,323.41, 915,271.54 and 391,370.77 is: 540,023.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,323.41 : 915,271.54 = 391,370.77 : x
  2. Step 2: Convert to fraction form
    663,323.41/915,271.54 = 391,370.77/x
  3. Step 3: Cross multiply
    663,323.41x = 915,271.54 × 391,370.77
  4. Step 4: Simplify right side
    663,323.41x = 358,210,527,368.89
  5. Step 5: Solve for x
    x = 358,210,527,368.89/663,323.41
  6. Step 6: Final answer
    x = 540,023.95

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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.