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Finding the Fourth Proportional to 678,007.50, 935,649.63 and 372,085.62

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Solution

The fourth proportional to 678,007.50, 935,649.63 and 372,085.62 is: 513,477.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,007.50 : 935,649.63 = 372,085.62 : x
  2. Step 2: Convert to fraction form
    678,007.50/935,649.63 = 372,085.62/x
  3. Step 3: Cross multiply
    678,007.50x = 935,649.63 × 372,085.62
  4. Step 4: Simplify right side
    678,007.50x = 348,141,772,681.32
  5. Step 5: Solve for x
    x = 348,141,772,681.32/678,007.50
  6. Step 6: Final answer
    x = 513,477.76

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1.5x scale

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.