Home / 305,390.02-421,430.40-169,423.30

Finding the Fourth Proportional to 305,390.02, 421,430.40 and 169,423.30

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Solution

The fourth proportional to 305,390.02, 421,430.40 and 169,423.30 is: 233,799.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,390.02 : 421,430.40 = 169,423.30 : x
  2. Step 2: Convert to fraction form
    305,390.02/421,430.40 = 169,423.30/x
  3. Step 3: Cross multiply
    305,390.02x = 421,430.40 × 169,423.30
  4. Step 4: Simplify right side
    305,390.02x = 71,400,129,088.32
  5. Step 5: Solve for x
    x = 71,400,129,088.32/305,390.02
  6. Step 6: Final answer
    x = 233,799.81

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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.