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Finding the Fourth Proportional to 405,006.80, 607,510.20 and 385,323.80

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Solution

The fourth proportional to 405,006.80, 607,510.20 and 385,323.80 is: 577,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,006.80 : 607,510.20 = 385,323.80 : x
  2. Step 2: Convert to fraction form
    405,006.80/607,510.20 = 385,323.80/x
  3. Step 3: Cross multiply
    405,006.80x = 607,510.20 × 385,323.80
  4. Step 4: Simplify right side
    405,006.80x = 234,088,138,802.76
  5. Step 5: Solve for x
    x = 234,088,138,802.76/405,006.80
  6. Step 6: Final answer
    x = 577,985.70

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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.