Home / 918,230.40-1,377,345.60-287,143.20

Finding the Fourth Proportional to 918,230.40, 1,377,345.60 and 287,143.20

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Solution

The fourth proportional to 918,230.40, 1,377,345.60 and 287,143.20 is: 430,714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,230.40 : 1,377,345.60 = 287,143.20 : x
  2. Step 2: Convert to fraction form
    918,230.40/1,377,345.60 = 287,143.20/x
  3. Step 3: Cross multiply
    918,230.40x = 1,377,345.60 × 287,143.20
  4. Step 4: Simplify right side
    918,230.40x = 395,495,423,089.92
  5. Step 5: Solve for x
    x = 395,495,423,089.92/918,230.40
  6. Step 6: Final answer
    x = 430,714.80

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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.