Home / 870,345.90-1,305,518.85-497,097.90

Finding the Fourth Proportional to 870,345.90, 1,305,518.85 and 497,097.90

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Solution

The fourth proportional to 870,345.90, 1,305,518.85 and 497,097.90 is: 745,646.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,345.90 : 1,305,518.85 = 497,097.90 : x
  2. Step 2: Convert to fraction form
    870,345.90/1,305,518.85 = 497,097.90/x
  3. Step 3: Cross multiply
    870,345.90x = 1,305,518.85 × 497,097.90
  4. Step 4: Simplify right side
    870,345.90x = 648,970,678,745.42
  5. Step 5: Solve for x
    x = 648,970,678,745.42/870,345.90
  6. Step 6: Final answer
    x = 745,646.85

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Double scale
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Similar ratio
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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.