Home / 865,111.80-1,298,979.90-665,657.40

Finding the Fourth Proportional to 865,111.80, 1,298,979.90 and 665,657.40

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Solution

The fourth proportional to 865,111.80, 1,298,979.90 and 665,657.40 is: 999,495.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,111.80 : 1,298,979.90 = 665,657.40 : x
  2. Step 2: Convert to fraction form
    865,111.80/1,298,979.90 = 665,657.40/x
  3. Step 3: Cross multiply
    865,111.80x = 1,298,979.90 × 665,657.40
  4. Step 4: Simplify right side
    865,111.80x = 864,675,582,886.26
  5. Step 5: Solve for x
    x = 864,675,582,886.26/865,111.80
  6. Step 6: Final answer
    x = 999,495.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.