Home / 779,980.30-1,169,970.45-442,890.70

Finding the Fourth Proportional to 779,980.30, 1,169,970.45 and 442,890.70

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Solution

The fourth proportional to 779,980.30, 1,169,970.45 and 442,890.70 is: 664,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,980.30 : 1,169,970.45 = 442,890.70 : x
  2. Step 2: Convert to fraction form
    779,980.30/1,169,970.45 = 442,890.70/x
  3. Step 3: Cross multiply
    779,980.30x = 1,169,970.45 × 442,890.70
  4. Step 4: Simplify right side
    779,980.30x = 518,169,031,579.82
  5. Step 5: Solve for x
    x = 518,169,031,579.82/779,980.30
  6. Step 6: Final answer
    x = 664,336.05

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1.5x scale

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.