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Finding the Fourth Proportional to 865,613.65, 1,194,608.65 and 478,420.76

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Solution

The fourth proportional to 865,613.65, 1,194,608.65 and 478,420.76 is: 660,254.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,613.65 : 1,194,608.65 = 478,420.76 : x
  2. Step 2: Convert to fraction form
    865,613.65/1,194,608.65 = 478,420.76/x
  3. Step 3: Cross multiply
    865,613.65x = 1,194,608.65 × 478,420.76
  4. Step 4: Simplify right side
    865,613.65x = 571,525,572,262.53
  5. Step 5: Solve for x
    x = 571,525,572,262.53/865,613.65
  6. Step 6: Final answer
    x = 660,254.81

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.