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Finding the Fourth Proportional to 507,810.60, 761,715.90 and 128,730.60

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Solution

The fourth proportional to 507,810.60, 761,715.90 and 128,730.60 is: 193,095.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,810.60 : 761,715.90 = 128,730.60 : x
  2. Step 2: Convert to fraction form
    507,810.60/761,715.90 = 128,730.60/x
  3. Step 3: Cross multiply
    507,810.60x = 761,715.90 × 128,730.60
  4. Step 4: Simplify right side
    507,810.60x = 98,056,144,836.54
  5. Step 5: Solve for x
    x = 98,056,144,836.54/507,810.60
  6. Step 6: Final answer
    x = 193,095.90

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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.