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Finding the Fourth Proportional to 675,678.72, 932,436.99 and 421,030.92

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Solution

The fourth proportional to 675,678.72, 932,436.99 and 421,030.92 is: 581,022.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,678.72 : 932,436.99 = 421,030.92 : x
  2. Step 2: Convert to fraction form
    675,678.72/932,436.99 = 421,030.92/x
  3. Step 3: Cross multiply
    675,678.72x = 932,436.99 × 421,030.92
  4. Step 4: Simplify right side
    675,678.72x = 392,584,803,741.73
  5. Step 5: Solve for x
    x = 392,584,803,741.73/675,678.72
  6. Step 6: Final answer
    x = 581,022.89

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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.