Home / 280,533.79-387,133.77-153,209.35

Finding the Fourth Proportional to 280,533.79, 387,133.77 and 153,209.35

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Solution

The fourth proportional to 280,533.79, 387,133.77 and 153,209.35 is: 211,427.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,533.79 : 387,133.77 = 153,209.35 : x
  2. Step 2: Convert to fraction form
    280,533.79/387,133.77 = 153,209.35/x
  3. Step 3: Cross multiply
    280,533.79x = 387,133.77 × 153,209.35
  4. Step 4: Simplify right side
    280,533.79x = 59,312,513,264.75
  5. Step 5: Solve for x
    x = 59,312,513,264.75/280,533.79
  6. Step 6: Final answer
    x = 211,427.34

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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.