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Finding the Fourth Proportional to 891,070.10, 1,336,605.15 and 260,047.70

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Solution

The fourth proportional to 891,070.10, 1,336,605.15 and 260,047.70 is: 390,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,070.10 : 1,336,605.15 = 260,047.70 : x
  2. Step 2: Convert to fraction form
    891,070.10/1,336,605.15 = 260,047.70/x
  3. Step 3: Cross multiply
    891,070.10x = 1,336,605.15 × 260,047.70
  4. Step 4: Simplify right side
    891,070.10x = 347,581,095,065.66
  5. Step 5: Solve for x
    x = 347,581,095,065.66/891,070.10
  6. Step 6: Final answer
    x = 390,071.55

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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.