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Finding the Fourth Proportional to 917,145.90, 1,375,718.85 and 286,058.70

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Solution

The fourth proportional to 917,145.90, 1,375,718.85 and 286,058.70 is: 429,088.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,145.90 : 1,375,718.85 = 286,058.70 : x
  2. Step 2: Convert to fraction form
    917,145.90/1,375,718.85 = 286,058.70/x
  3. Step 3: Cross multiply
    917,145.90x = 1,375,718.85 × 286,058.70
  4. Step 4: Simplify right side
    917,145.90x = 393,536,345,796.50
  5. Step 5: Solve for x
    x = 393,536,345,796.50/917,145.90
  6. Step 6: Final answer
    x = 429,088.05

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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.