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Finding the Fourth Proportional to 338,430.51, 507,646.94 and 85,710.87

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Solution

The fourth proportional to 338,430.51, 507,646.94 and 85,710.87 is: 128,566.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,430.51 : 507,646.94 = 85,710.87 : x
  2. Step 2: Convert to fraction form
    338,430.51/507,646.94 = 85,710.87/x
  3. Step 3: Cross multiply
    338,430.51x = 507,646.94 × 85,710.87
  4. Step 4: Simplify right side
    338,430.51x = 43,510,860,451.68
  5. Step 5: Solve for x
    x = 43,510,860,451.68/338,430.51
  6. Step 6: Final answer
    x = 128,566.60

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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.