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Finding the Fourth Proportional to 649,483.86, 896,259.51 and 355,128.18

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Solution

The fourth proportional to 649,483.86, 896,259.51 and 355,128.18 is: 490,061.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,483.86 : 896,259.51 = 355,128.18 : x
  2. Step 2: Convert to fraction form
    649,483.86/896,259.51 = 355,128.18/x
  3. Step 3: Cross multiply
    649,483.86x = 896,259.51 × 355,128.18
  4. Step 4: Simplify right side
    649,483.86x = 318,287,008,593.99
  5. Step 5: Solve for x
    x = 318,287,008,593.99/649,483.86
  6. Step 6: Final answer
    x = 490,061.46

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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.