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Finding the Fourth Proportional to 421,407.07, 581,543.68 and 230,420.30

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Solution

The fourth proportional to 421,407.07, 581,543.68 and 230,420.30 is: 317,981.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,407.07 : 581,543.68 = 230,420.30 : x
  2. Step 2: Convert to fraction form
    421,407.07/581,543.68 = 230,420.30/x
  3. Step 3: Cross multiply
    421,407.07x = 581,543.68 × 230,420.30
  4. Step 4: Simplify right side
    421,407.07x = 133,999,470,086.51
  5. Step 5: Solve for x
    x = 133,999,470,086.51/421,407.07
  6. Step 6: Final answer
    x = 317,981.07

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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.